카테고리 없음
How to recover and restore data with RAID | Learn how to do it and take notes!
LemonDKel
2022. 8. 3. 14:37
There is a way to build and operate RAID with multiple HDDs to avoid losing valuable data.There are multiple types of RAID (levels), each operating in a different way and dealing with the need for data recovery.There are various symptoms of RAID equipment, such as inaccessible NAS servers such as TeraStation, LinkStation, and LANDISK, which are building RAID, not booting, not connecting to shared folders, deleted files and folders, and error messages.Here are some data recovery and restoration tips that you can try in the event of a failure or trouble with your RAID device.
Table of Contents
1. What is RAID?
1.1. Differences Between Data Recovery and Data Failure
1.2. RAID Type (Level)
1.3. Examples of symptoms that require RAID data recovery
1.4. Types of failures that require RAID data recovery
1.5. Examples of Causes of Symptoms and Failures in RAID Equipment
1.6. Learn how to restore RAID data when you want to.
1.7. What to keep in mind when recovering RAID data?
1.8. How to recover or restore data by RAID type
1.9. Learn how to recover and restore RAID data
1.10. How to Choose a Data Recovery Service Provider
2. Summary - In case of trouble
What is RAID?
RAID is a combination of HDDs and SSDs that can be recognized and displayed as a single drive.The official name is Redundant Array of Inexpensive Disks (RAID), or Redundant Array of Inexpensive Disks.
·Examples of the purpose of building RAID on NAS (TeraStation, LinkStation, LANDISK, etc.) and servers
When configuring RAID using multiple recording media, such as hard drives, the main objectives are:
①For faster processing, such as reading and writing data
②in order to increase the amount of data that can be stored
③Access data if the hard drive fails
④Data can be restored in the event of a hard drive failure (to preserve data)
Differences Between Data Recovery and Data Failure
Data recovery refers to the rescue of data stored on a failed recording medium in the event of a failure or failure of a hard drive, server, or PC that is configured with RAID, so that data can be recovered for use as before the failure occurred.The types of failures that require RAID data recovery are largely logical and physical, and recovery methods vary depending on the symptoms and location of the equipment failure.
A data failure is a condition in which a recording medium, such as a hard drive or server, has failed to read or write data correctly.
RAID Type (Level)
RAID types (levels) include:Among them, RAID 0, RAID 1, RAID 5, and RAID 6 are common types of RAID.
RAID 0 (striping)
RAID 1 (mirroring)
RAID 5
RAID 6
RAID 01
RAID 10
RAID 2
RAID 3
RAID 4
RAID 50
1. RAID 0 (Striping)
RAID 0 is also known as striping.It is a technology that writes data across two or more hard drives.
· Benefits of using RAID 0
①Hard drive storage capacity is the most efficient
②Can write data faster
PC When a PC writes data to a network hard drive, the RAID controller card automatically splits the data written to each drive.Therefore, it is expected to speed up the processing.
·Disadvantages of using RAID 0
①There is no redundancy.
②Even one hard drive configured for RAID fails, or if a problem occurs, data cannot be recovered
2. RAID 1 (mirroring)
RAID 1 is also known as mirroring.Copy, duplicate, and write the same data to two hard drives.
· Benefits of using RAID 1
If one of the two hard drives configured for RAID fails, data can be recovered immediately as long as the other is safe.
·Disadvantages of using RAID 1
①The same data is written to two hard drives, doubling the capacity and cost of using it.
②If both hard drives that are configured for RAID are damaged, it may be difficult to recover.
·Cautionary points when configuring RAID 1
①Data will be deleted from both hard drives if data is deleted from NAS or server (no backup capability)
②Important data needs to be backed up separately
3. RAID 5
RAID 5 is called distributed data gardening.RAID 5 refers to a method of configuring RAID with at least three hard drives.By constantly storing parity data for one hard drive capacity, RAID 5 can recover data from any part of the RAID configured hard drive that might fail.
パ Parity refers to a code used to detect and correct errors when receiving, delivering, or recording data due to a disk failure.Parity is automatically generated with redundant code used for data recovery.
· Benefits of using RAID 5
①US>Equipment can run if one of the multiple hard drives configured for RAID fails
②Helps reduce risk of a hard drive failure on a NAS or server
·Disadvantages of using RAID 5
①CPU is overloaded when calculating parity
②Failure of more than one hard drive configured for RAID may result in difficulty in recovery.
③As the number of disks increases, there are concerns that it will cost more to operate.
4. RAID 6
RAID 6 is a RAID type that uses the same technology as RAID 5.The difference between the two is how to use parity.RAID 6 generates parity in duplicate and records on different HDDs, so you can expect more risk avoidance in the event of a failure than RAID 5.
· Benefits of using RAID 6
○ RAID 6 can recover original data from remaining data in the event of two hard drives
RA RAID 5 differs from the fact that if two hard drives fail, automatic recovery will not be possible.
·Disadvantages of using RAID 6
①Capacity efficiency and write performance are lower than RAID 5 due to increased parity generation
②Data recovery may be difficult on its own, depending on the state and number of hard drives that have failed, even when configured with RAID 6.
③As the number of disks increases, there are concerns that it will cost more to operate.
6.RAID 10
RAID 10 (RAID 1+0) is a combination of RAID 1 and RAID 0.Similar to RAID 1 (mirroring), the same data is copied and replicated to two hard drives for write.When writing, data is divided into blocks and written in parallel, which speeds up writing data.
• Benefits of RAID 10 (RAID 1+0)
High RAID 1 redundancy combined with high RAID 0 speed
·Disadvantages of RAID 10 (RAID 1+0)
①Use only half the disk space when writing data
②Configuring RAID 10 requires up to four hard drives, increasing costs
10.RAID 50
RAID 50 (RAID 5+0) is a combination of RAID 5 and RAID 0.Multiple RAID 5 configurations are available and can be operated by striping each.
• Benefits of RAID 50
US>Expect faster transfer speeds than configured with RAID 5 only
·Disadvantages of RAID 50
Minimum configuration requires 6 HDDs and increases deployment costs accordingly
US>Examples of symptoms that require RAID data recovery
If the following symptoms appear on the server or internal hard drive that you are building and operating RAID, you will need to consider restoring the data.
RAID equipment will not boot and will not power on.
Cannot access network hard drives or servers built with RAID
Cannot access or connect to shared folders
The case lamp is flashing red.
get an error message
hear a noise
Internal Hard Drive Not Recognized
RAID devices are not recognized on the network
I accidentally deleted shared files and folders
In the event of any of the above symptoms or problems, it is a priority to turn off the equipment and stop operating or working.As a result of doing simple things such as continuing to power on and power off and rebooting, the data stored in the RAID device is not only more difficult to recover, but also more likely to be in an unrecoverable situation.In the event of any of the above symptoms or problems, it is assumed that the internal HDD is experiencing a logical or physical failure, and you should also be aware that the act of trying to use it as usual is a dangerous operation to lose data.If you accidentally delete the necessary files or folders, the data will continue to be overwritten just by browsing other folders or creating new files as usual.If you need to recover or restore data from RAID, it′s your top priority to stop.
↓If you are having trouble starting the TerStation, click here.
AT DATA RECOVERY MEDIUM
Learn what to do if the TeraStation does not start.
https://www.adte.jp/rec/hdd/post-2223/
In some cases, problems such as suddenly not being able to put in shared folders, not being able to access TerStation, and not being able to move after moving may occur.Management software shows TerStation
Types of Faults that Require RAID Data Recovery
If there are any symptoms or problems with the hard drives or servers that are configured with RAID, it is estimated that the following failures are occurring:
Physical failure of RAID equipment
Logical failure of RAID equipment
1. Physical failure of RAID equipment
A physical failure is a failure caused by a physical failure or corruption of a hard drive in a RAID server.RAID problems are overwhelmingly caused by internal hard drive failures, and should be noted.In the event of a physical failure of the hard drive that is part of RAID, four essentials are required: クリーン dedicated environment such as clean room な deep expertise 高度 advanced technical capabilities 互換 procuring compatible parts.If you proceed with some work or operation by yourself, the condition will become serious, and if the symptoms appear immediately, the situation that could have been recovered quickly and cheaply may fall into an unrecoverableIf the data you have saved is important, if you can′t retrieve it, you need to solve the problem quickly, or if you want to reduce the cost, contact a professional data recovery company should be given priority.
·Examples of physical failure of RAID equipment that may require data recovery
1. RAID equipment does not boot, does not power on, 2. Cannot access a network hard drive or server built with RAID, 3. Cannot access or connect to a shared folder, 4. Blinking red, 5. Error message, 6. Noise, 7. Internal hard drive not recognized, 8. Not recognized on the network, etc.
2. Logical failure of RAID equipment
Logical failure is a failure caused by a programmed problem, human error, virus infection, system crash, etc., such as incorrect deletion, etc., although the hard drive or casing is fine or not broken.When a logical failure occurs, the RAID unit itself is often operational and often unaware of the failure.If you don′t notice a failure and continue to use RAID equipment, it can not only increase the difficulty of data recovery, but also make it difficult to recover itself.
·Examples of symptoms and problems that cause logical failure of RAID equipment and require data recovery
7. Internal HDD not recognized / 8. RAID device not recognized on network / 9. Wrongly deleted shared files and folders, etc.
Examples of Causes of Symptoms and Failures in RAID Equipment
The possible causes of symptoms and problems with RAID equipment are as follows:
Hard drive failure or failure
RAID Controller Card Failure or Defects
Problem with RAID configuration information
Virtualization Troubleshooting Disk Corruption
deterioration over time
effects of power outages and lightning strikes
vibrations and shocks were added
1. Hard drive failure or failure occurs
Problems with RAID devices are often caused by internal hard drive failures or failures.If you experience symptoms such as RAID equipment not starting, shared folders not being accessible, flashing red, noise, or error messages, you should think that the internal hard drive has failed.If the hard drive that is configuring RAID is broken or about to break, it is best to prioritize turning off the equipment and prevent deterioration of condition.In the event of a problem with the hard drives that make up RAID, repair and data recovery operations are essential: クリーン dedicated environment such as a clean room 高度 advanced technical capabilities 深い deep expertise 互換 procurement and replacement of compatible parts.It is difficult to deal with individuals, so you should consult a professional restoration company.
2. RAID controller card failure or malfunction
When building RAID with multiple HDDs, a component called a RAID controller is responsible for virtualizing multiple disks together to recognize and control them as a single drive.A RAID controller card is one of the boards and is often caused by damage to the controller card if the internal hard drive that is configured for RAID is not recognized or data cannot be accessed.Do not turn the RAID controller card on or off if it is faulty or damaged.When power and communication resume, the RAID controller card reads and writes a lot to the hard drive, leading to corruption, destruction of configuration information, and overwriting of data.Most of the causes of failure of the RAID controller card are (1) deterioration over time (2) shock and fall (3) thermal runaway (4) adhesion of foreign substances including dust and dust.Powering off equipment is a top priority in the event of a RAID controller failure.You may end up in an irreversible situation just by conducting electricity to do something.If your RAID controller card is defective or damaged, it is difficult for you to handle it personally, so leave it to the professional.
3. RAID configuration information is problematic
Be careful when you receive error messages such as RAID Configuration Error, RAID Configuration Corrupted, or RAID Collapse Mode.If the RAID device does not start and the data inside is inaccessible, do not do anything and turn off the unit.If you don′t do anything after an error occurs, data recovery is often possible quickly and cheaply.However, if the configuration information fails and the power is turned off or restarted, the configuration information may collapse and become irreparable.If the RAID configuration information is initialized upon reboot, it may be difficult to recover the data itself.If a RAID device fails or becomes unable to load, you should turn off the unit and consult a professional data recovery company.
4. Virtualization Troubleshooting Disk Corruption
RAID often uses specialized operating systems, and virtualized environments are becoming increasingly diverse.In the case of virtualization servers, it is often set in a special file format, and if a file is corrupted, the virtual disk itself will not be able to read.In the event of a virtual environment problem, you must attempt to recover from a virtualized state, and in the event of difficulty, analyze the symptoms of the disks on the original server before proceeding with the recovery.Therefore, if you proceed with the operation or work easily, you may end up in an irreversible situation.The best way to do nothing without trying to force yourself to move is to contact a professional restoration company if you have any difficulties or concerns.
5. Deterioration over time
If you have used a hard drive that is configured with RAID for a long time, it can often fail or fail due to aging.Recording media such as HDDs are also consumables, and if you experience problems after several years of operation, it is better to stop using them because of aging.The condition will become serious with simple operations such as continuing to energize when a failure is suspected due to aging, turning off the power, and restarting.
6. Effects of power outages and lightning strikes
After a power outage or lightning strike, problems such as the inability to start a RAID device or access a shared folder often occur.Power cycling after a power outage can often cause fatal damage to the chassis or internal hard drive.The best way to deal with this problem is to unplug the cable from the main body and prevent the current from flowing if there is any problem or symptom after a power outage or lightning strike.
7. Vibrations and shocks were added
When moving or remodeling, the RAID device is often shocked.If you experience symptoms or trouble after moving the position, do not touch the device any more.Networks, servers, and internal disks are very vulnerable to shock and vibration.If something goes wrong after moving the device, it is estimated that vibration or shock is added to the device, which leads to the occurrence of the symptom.Because the risk of data loss increases just by continuing to power on, you can start by turning off the power and unplugging the cable.
Learn how to restore RAID data when you want to.
When data recovery is required for RAID, an error message is displayed due to a failure or failure of one of the hard drives that make up the RAID, and the lights on the NAS or the server itself are flashing red.It is also important to check the status from the RAID Configuration Utility screen.However, trying RAID data recovery on your own is often a dangerous act to lose important data, so you should prioritize using a free consultation from a professional data recovery provider when you are in trouble or trouble.
How to use RAID data recovery software
US>Example Flow for RAID Data Recovery Using Restore Software
US>Examples of RAID Media Types that Recovery Software Can Restore
1. How to use RAID data recovery software
If the hard drive that is configured with RAID is not physically faulty, you may want to use the data recovery software to try to restore it.If you think the RAID device is experiencing symptoms due to aging, power failure, shock or fall, you should not choose how to use the software.RAID data recovery using software is only possible when there is a mild logical failure.Network HDDs and servers built and operated by RAID are often used by multiple people, so if you have important data, don′t want to fail, don′t want to recover, or want to save money, prioritize using free consultation from a professional data recovery company before using recovery software.It is better to avoid the consequences of using the software easily and regretting it.
2. Flow of RAID data recovery using restore software
The following is the way to use the restore software when you want to perform data recovery for RAID.If you want to restore the data without fail, if you can′t retrieve it, or if you want to restore the data at a low cost, stop and consult with a professional before proceeding.The risk of losing data increases if you proceed recklessly.·Things that need to be prepared in advance
①PC (Windows/Mac)
②Hard drives in a RAID device (such as a network hard drive or server such as a TeraStation or LinkStation or LANDISK) that you want to restore data to.
③data recovery software
④Cable for connecting a PC to a hard drive
·Examples of procedures for recovering RAID data using software
①search for recovery software
②download software
③Installing Recovery Software on a PC
④Select the drive you want to restore from the initial screen of the recovery software → Click Scan
⑤Scanned → Detected deleted files, etc. Scan the entire → drive
⑥Search for detected data and check on preview screen
⑦Select the data you want to restore → Click Recovery
⑧Once the deleted data, deleted folders, and files have been restored, the task is complete.
*Please note that if you don′t save the restored data outside of the original storage location, the data will be overwritten.
You may be able to restore data by trying to use the recovery software when data disappears from a RAID device or accidentally erases folders or files, but you may not be able to restore the files or folders you want, garbled characters, or only partially restored.Recovery software can only recover RAID data when there is a mild logical failure, and scanning software when there is a physical failure, including moderate or older logical failures, can often lead to severe conditions and unrecoverable conditions.Data stored in the RAID device is important, it will be a problem if it disappears, it may cause inconvenience to customers, I want to solve the problem quickly, and if I want to restore it at a low cost, it is better to prioritize using free consultation from a professional data recovery company.
3. Examples of RAID media types that can be restored by the recovery software
Since there are few recovery software that supports RAID and no free software is available, you will need to find a paid version to purchase it if you want to use the software to recover RAID.However, it is often impossible to restore even if you use paid restoration software. As a result of using the software, the condition often deteriorates.If you use the software easily because you think it′s easy to keep costs down, you may regret it.If you are concerned about recovery costs or want to recover quickly and cheaply, contact a professional data recovery company is a priority.
Example of a model where data can be restored using recovery software Example of media where data can be recovered
HDD/SSD Network HDD/SSD embedded in HDD, server, etc.
NAS(ネットワークHDD) TeraStation・LinkStation、Landisk・Soundgenic・RECBOX QNAP NAS(QNAP TS・QNAP HS・QNAP TBS・QNAP TVS) SynologyNAS(DiskStation・RackStation・DS)、エレコム NAS(NSB)、YANO NAS(N-RAID)、NETGEAR NAS(ReadyNAS)、ASUSTOR NAS(AS・LOCKERSTOR・NIMBUSTOR)ロジテックNAS(LSV) メルコシンクレッツ NAS(DELA)、Thecus NAS、ニューテックNAS(NEBBN・NESBN・NCDEN) マウスコンピューター(MousePro)、BIOS(PS)、Infortrend (EonNAS)、drobo(Drobo), Princeton (Digital Image EN) Bluesound (VAULT), IMATION (Data Appliance), Lenovo (Iomega), StoreJet Cloud, Hanwha (MvixBOX), WESTERN DIGITAL (WD Cloud), Panasonic (Technics), Corega (HDD BANK TERA), etc.
Server DELL (PowerEdge PowerVault), HP (ProLiant), FUJITSU Server PRIMERGY (Primary), IBM (TotalStorage), NEC (Express), New Tech Supremacy (Sprémacy), etc.
What to watch out for when you want to recover data from RAID
I often panic when something happens to the RAID device.When you want to retrieve or recover data from a RAID device such as a network hard drive or server, be careful not to:As a result of doing what you can easily do, you can often end up in a situation where you can recover quickly and cheaply, but you can′t recover.
without continuing to energize
Repeated power-on and reboots are not allowed.
Replacement or replacement of HDDs can lead to data loss of data
RAID rebuild (rebuild) is dangerous
Avoid connecting a hard drive to a PC alone
Do not replace the RAID card (controller card)
1. Do not continue to energize
The best solution is to turn off the power in the event of a RAID device failure and ensure that the condition remains the same.You may end up in a dangerous situation where you might lose data just by connecting the cables and continuing to energize.Let′s start by unplugging the cable so that the current doesn′t pass.
2. Repeated power-on/reboot is not allowed.
If the RAID device does not start, does not have access to shared folders, displays an error message, or the lamp on the main unit is flashing red or blinking red and cannot be used, do not cycle the power cycle or reboot.Power cycling or rebooting is one of the most stressful activities, and if internal hard drives or components fail or are damaged, the RAID controller will malfunction or cause new failures.As a result of simple actions, it is not only difficult to recover data, but also difficult to recover itself, so you need to be careful.When you′re in trouble, give priority to using free consultation from a professional data recovery company.Even if the power is turned off or restarted repeatedly, RAID data recovery has a lot of experience. Many companies with advanced technology can recover quickly and cheaply.If you want to keep costs down, let′s start by contacting them when you′re worried.
3. Replacement or replacement of HDD can lead to loss of data
Recognize that removing or replacing a hard drive that is configured with RAID from a NAS or server is a dangerous activity.RAID uses multiple disks to make it look like a single drive, but when one of the multiple disks fails, the other disks are likely to fail or break.This may be due to the fact that several disks built into the NAS or server are manufactured at the same time.If one of the disks is broken, it is better to think that the other disks are also broken and move to avoid the risk of data loss.If a hard drive that is configured for RAID fails or fails, it will automatically rebuild (rebuild) the RAID after removing, replacing, or replacing the disk with another hard drive, increasing the risk of data loss and difficult recovery.
4. RAID rebuild (rebuild) is dangerous
When a RAID rebuild (rebuild) or a hard drive is replaced and automatically rebuilt (rebuild), it often stops or fails in the middle, and you need to be careful.Reconstruction (rebuild) is one of the most demanding behaviors on the hard drive, which often results in a single disk failure leading to multiple failures.Also, it is better to be aware that reconstruction (rebuild) often fails, causing RAID corruption, overwriting data, and other operations that are at high risk for data loss.You may want to retrieve or recover data, but reconstruction (rebuild) not only increases the difficulty of recovery, but you may also end up in an unrecoverable situation.RAID reconstruction (rebuild) itself is one of the operations that requires expertise and experience, and if you proceed with it easily, you may regret it.If you really want to replace, replace, or rebuild (rebuild) your hard drive, consult a professional data recovery company before proceeding.
↓ What is a RAID rebuild (rebuild)? Risk and failure examples are also detailed below.
AT DATA RECOVERY MEDIUM
RAID rebuild (rebuild) failed or Method
https://www.adte.jp/rec/hdd/post-1549/
If a hard drive that is configured for RAID is damaged, data can be recovered by replacing the hard drive and reconfiguring it (rebuilding), and many of you may recognize that the system can be restored to its original state.However, reconstruction itself is a high risk.
5. Avoid connecting the HDD to the PC
In the event of a problem, you may think about taking an internal hard drive from a NAS or server that is building RAID and connecting it directly to your computer to retrieve and recover data.However, be aware that even if you connect a hard drive that is configured with RAID to a PC, you will not be able to see the data used and inside like an external hard drive.Also, connecting a hard drive to a personal computer will allow data to be overwritten, error messages will be displayed, file system corruption will be accelerated, failure conditions will not be severe, and the risk of data loss will increase.Also, if you don′t want to lose data, you shouldn′t take out the disk itself, as RAID rebuilds will also take place when you return the hard drive to the NAS or server.
6. Do not replace the RAID card (controller card)
Do not rush to replace a new RAID card if the RAID card (controller card) fails.RAID cards are often special and require deep expertise to find and replace compatible RAID cards.If you replace it with a wrong RAID card, the data may disappear or you may not be able to see the data.Also, if you reconfigure (rebuild) RAID with the wrong RAID card, it will not only increase the difficulty of data recovery, but it will also become difficult to recover itself.Large tower, rack, and blade servers have specialized RAID cards, so you need to be careful handling.When a RAID card problem occurs, the file system on the hard drive is often at the same time.In this case, even if there is no problem with the compatibility of the RAID card, there are many times when you are confused because you cannot see the data.If you think that you don′t want to lose, fail, or be unable to retrieve your data, you should leave it to a professional data recovery company.
How to recover or restore data by RAID type
There are many different types of RAID, and the recovery methods vary depending on the type.Below are some of the main types of RAID recovery methods.
How to Recover RAID 0
How do I recover RAID 1?
How do I recover RAID 5 and 6?
1. How to Recover RAID 0
If you run a NAS or server with RAID 0, you will not be able to use it if even one internal hard drive fails.An error message is displayed.·The lamp is blinking red.·After using it for a long time, it may deteriorate over time.·If there is a power outage or lightning strike, turn off the power of the hard drive itself.If a NAS built with RAID 0 fails, it is best to contact a specialized data recovery provider.
↓ Please refer to the following when data recovery for RAID 0 is required.
AT DATA RECOVERY MEDIUM
How do I recover data in the event of a RAID 0 recovery or failure?
https://www.adte.jp/rec/hdd/post-2729/
There are many cases where there are sudden problems with the equipment used to share data in the company or at home, such as the equipment operating under RAID 0 does not start, the equipment cannot be accessed, the access lamp is not lit, etc.We′re working on RAID.
2. How to Recover RAID 1
It is a type of RAID that does not matter if one of the two RAID units is suspected to have been damaged or failed, but it is difficult to notice the failure, so be careful.Both of them may fail as a result of continuing to operate without noticing the failure of one disk.Let′s check the operation regularly.In the event of a suspected failure of a disk running on RAID 1, data recovery may be accomplished by simply backing up the data and replacing the failed hard drive.RAID rebuild (rebuild) also occurs automatically.However, if one disk fails, the other disk is broken or is about to break, and it is important to note that replacing the hard drive and rebuilding the RAID (rebuild) will cause both of them to break completely and become serious.If you think that replacing a hard drive itself is a risk of losing data, and you are worried about losing or losing your stored data, you should give priority to consulting a professional data recovery company before replacing a hard drive.It′s better to avoid the consequences of regretting the work by proceeding with it easily.Also, using free consultation from professionals will help you solve your worries quickly and save you money on restoration costs.
3. How do I recover RAID 5 and 6?
If you run a NAS or server with at least 3 RAID 5 and at least 4 RAID 6 to build RAID, data recovery is expected to be easy in the event of a single RAID 5 and 2 RAID 6 disk failure.RAID 5 and RAID 6 can be recovered by simply replacing a broken hard drive, just like RAID 1 recovery, but as mentioned in ′What to Be careful about when you want to recover RAID data,′ replacing a hard drive itself is also a dangerous act to lose data.If one hard drive fails, most of the time other hard drives have already failed or are about to break, and as a result of replacing the hard drive, the condition often becomes more severe.In the event of multiple hard drives being destroyed, it will be difficult to recover data personally, whether it be RAID 5 or RAID 6.It is better to avoid making recovery difficult or making recovery difficult because the HDD was replaced easily.If the data contained in the RAID device is important, I want to solve the problem quickly, I don′t want to fail, I want to run out of files and folders, and I want to reduce costs, I will start by using the data recovery company′s free consultation before proceeding.It will lead to the desired result immediately.
↓See also if you would like to perform data recovery for RAID 5.
AT DATA RECOVERY MEDIUM
If you need to recover data from RAID 5, provide examples of failures and tips on how to deal with them!
https://www.adte.jp/rec/hdd/post-2599/
I can′t access the NAS that I was running with RAID 5, the lamp is blinking red, an error message is displayed, the server may be broken, the internal hard drive has failed, and so on, the server I am using with RAID 5 suddenly has trouble.
Learn how RAID can recover and restore data
In the event of a problem or failure of a RAID device, the response will vary depending on whether you want to recover or restore data stored on a NAS, server, or internal hard drive, or whether you want the device to boot or return to use without data.′For those who need or value data, go to the ′′Data Recovery Service Provider.′′′If you don′t need data or only want to repair the case, consider consulting with the ′buyer or manufacturer.′
How to send it to a store or manufacturer′s repair shop
How to consult a data recovery service provider
1. How to send it to a store or manufacturer′s repair shop
If you don′t need data stored on a RAID device, NAS, server, or internal hard drive, and you only want to repair the case or disk, or if you want it back to work, consider sending it to the store or manufacturer′s repair shop.If you send it to the store or the manufacturer′s repair, you need to be aware that the stored data is not guaranteed and the data is initialized and disappeared or disappeared.Repairs are intended to be returned to service by replacing or repairing broken equipment or damaged parts.Also, if you send it to the store or manufacturer, it will take a long time to repair it, not a few weeks, so you need to be careful.It is better to think only when you don′t need data or have enough time to send it to the store or the manufacturer′s repair.If the data inside is more important than the RAID device running, or if you want to prioritize recovery or rescue, choose another method.
2. How to consult with a data recovery service provider
If you need data from a RAID device, NAS, server, or internal hard drive, or if you′re in trouble if it′s gone or you can′t take it out, choose a way to talk to a data recovery service provider.When you consult with a data recovery provider, you have deep expertise and advanced technology to identify the cause, type of failure, and location of damage, so you can respond to physical or logical failures.When choosing a data recovery service provider, it is recommended to check if the company has ′original technology′ or ′AI technology.′It is a standard for determining whether you are a highly skilled company.Because of its advanced technological capabilities, recovery time can be reduced, and quick response and recovery costs can be reduced.By any chance, if you send it to a company that doesn′t have technical capabilities, it will not only be able to recover and retrieve the data, but it may also lead to deterioration of the condition.It is not possible for any company to recover in the same way, and there is a big difference in service content and technical capabilities between companies.Therefore, it is very important to choose the first company you request.
How to Choose a Data Recovery Service Provider
When a hard drive, NAS, or server that is configured with RAID is experiencing symptoms or failures, it is common to panic.When you are not sure which vendor to contact or are worried about how to find it, pay attention to the following points and make a decision.
Does the organization have its own technology or AI technology and is performing restoration work with advanced technology?
Is the speed and response to restoration fast?
Is the restoration fee and plan specified on the website?
Are information confidentiality obligations and security controls in place?
Does the organization work in a dedicated environment such as a clean room?
availability of response and restoration results
Priority should be given to contact the data recovery service provider if the data stored in the RAID device is important, need to be retrieved, want to solve the problem as soon as possible, want to minimize disruption to business, want to restore at low cost, worry about recovery costs.Advanced Technology is a recommended data recovery company that meets all 1 to 6.Advanced technology enables fast response and low cost data recovery, and has a proven track record of RAID problems.
Summary - In case of trouble
If you experience problems such as hard drives, NASs, or servers that are configured with RAID and cannot boot, files and folders are inaccessible, an error message is displayed, or the lamp is flashing red, turn off the computer, and use a free consultation with a professional data recovery company.If the recording medium, such as the RAID device itself or the internal hard drive, fails, it is extremely dangerous to turn the power on and off.The condition will deteriorate, and not only will it increase the difficulty of recovery, but it will also increase the risk of data loss.When you′re having trouble with RAID, you need deep expertise and technical expertise to identify and respond appropriately, so choosing a company is important to ensure data is retrieved.Advanced technology has its own technology and AI technology, and its advanced technology enables quick recovery and low cost data recovery.I recommend it because it responds kindly to questions.
Table of Contents
1. What is RAID?
1.1. Differences Between Data Recovery and Data Failure
1.2. RAID Type (Level)
1.3. Examples of symptoms that require RAID data recovery
1.4. Types of failures that require RAID data recovery
1.5. Examples of Causes of Symptoms and Failures in RAID Equipment
1.6. Learn how to restore RAID data when you want to.
1.7. What to keep in mind when recovering RAID data?
1.8. How to recover or restore data by RAID type
1.9. Learn how to recover and restore RAID data
1.10. How to Choose a Data Recovery Service Provider
2. Summary - In case of trouble
What is RAID?
RAID is a combination of HDDs and SSDs that can be recognized and displayed as a single drive.The official name is Redundant Array of Inexpensive Disks (RAID), or Redundant Array of Inexpensive Disks.
·Examples of the purpose of building RAID on NAS (TeraStation, LinkStation, LANDISK, etc.) and servers
When configuring RAID using multiple recording media, such as hard drives, the main objectives are:
①For faster processing, such as reading and writing data
②in order to increase the amount of data that can be stored
③Access data if the hard drive fails
④Data can be restored in the event of a hard drive failure (to preserve data)
Differences Between Data Recovery and Data Failure
Data recovery refers to the rescue of data stored on a failed recording medium in the event of a failure or failure of a hard drive, server, or PC that is configured with RAID, so that data can be recovered for use as before the failure occurred.The types of failures that require RAID data recovery are largely logical and physical, and recovery methods vary depending on the symptoms and location of the equipment failure.
A data failure is a condition in which a recording medium, such as a hard drive or server, has failed to read or write data correctly.
RAID Type (Level)
RAID types (levels) include:Among them, RAID 0, RAID 1, RAID 5, and RAID 6 are common types of RAID.
RAID 0 (striping)
RAID 1 (mirroring)
RAID 5
RAID 6
RAID 01
RAID 10
RAID 2
RAID 3
RAID 4
RAID 50
1. RAID 0 (Striping)
RAID 0 is also known as striping.It is a technology that writes data across two or more hard drives.
· Benefits of using RAID 0
①Hard drive storage capacity is the most efficient
②Can write data faster
PC When a PC writes data to a network hard drive, the RAID controller card automatically splits the data written to each drive.Therefore, it is expected to speed up the processing.
·Disadvantages of using RAID 0
①There is no redundancy.
②Even one hard drive configured for RAID fails, or if a problem occurs, data cannot be recovered
2. RAID 1 (mirroring)
RAID 1 is also known as mirroring.Copy, duplicate, and write the same data to two hard drives.
· Benefits of using RAID 1
If one of the two hard drives configured for RAID fails, data can be recovered immediately as long as the other is safe.
·Disadvantages of using RAID 1
①The same data is written to two hard drives, doubling the capacity and cost of using it.
②If both hard drives that are configured for RAID are damaged, it may be difficult to recover.
·Cautionary points when configuring RAID 1
①Data will be deleted from both hard drives if data is deleted from NAS or server (no backup capability)
②Important data needs to be backed up separately
3. RAID 5
RAID 5 is called distributed data gardening.RAID 5 refers to a method of configuring RAID with at least three hard drives.By constantly storing parity data for one hard drive capacity, RAID 5 can recover data from any part of the RAID configured hard drive that might fail.
パ Parity refers to a code used to detect and correct errors when receiving, delivering, or recording data due to a disk failure.Parity is automatically generated with redundant code used for data recovery.
· Benefits of using RAID 5
①US>Equipment can run if one of the multiple hard drives configured for RAID fails
②Helps reduce risk of a hard drive failure on a NAS or server
·Disadvantages of using RAID 5
①CPU is overloaded when calculating parity
②Failure of more than one hard drive configured for RAID may result in difficulty in recovery.
③As the number of disks increases, there are concerns that it will cost more to operate.
4. RAID 6
RAID 6 is a RAID type that uses the same technology as RAID 5.The difference between the two is how to use parity.RAID 6 generates parity in duplicate and records on different HDDs, so you can expect more risk avoidance in the event of a failure than RAID 5.
· Benefits of using RAID 6
○ RAID 6 can recover original data from remaining data in the event of two hard drives
RA RAID 5 differs from the fact that if two hard drives fail, automatic recovery will not be possible.
·Disadvantages of using RAID 6
①Capacity efficiency and write performance are lower than RAID 5 due to increased parity generation
②Data recovery may be difficult on its own, depending on the state and number of hard drives that have failed, even when configured with RAID 6.
③As the number of disks increases, there are concerns that it will cost more to operate.
6.RAID 10
RAID 10 (RAID 1+0) is a combination of RAID 1 and RAID 0.Similar to RAID 1 (mirroring), the same data is copied and replicated to two hard drives for write.When writing, data is divided into blocks and written in parallel, which speeds up writing data.
• Benefits of RAID 10 (RAID 1+0)
High RAID 1 redundancy combined with high RAID 0 speed
·Disadvantages of RAID 10 (RAID 1+0)
①Use only half the disk space when writing data
②Configuring RAID 10 requires up to four hard drives, increasing costs
10.RAID 50
RAID 50 (RAID 5+0) is a combination of RAID 5 and RAID 0.Multiple RAID 5 configurations are available and can be operated by striping each.
• Benefits of RAID 50
US>Expect faster transfer speeds than configured with RAID 5 only
·Disadvantages of RAID 50
Minimum configuration requires 6 HDDs and increases deployment costs accordingly
US>Examples of symptoms that require RAID data recovery
If the following symptoms appear on the server or internal hard drive that you are building and operating RAID, you will need to consider restoring the data.
RAID equipment will not boot and will not power on.
Cannot access network hard drives or servers built with RAID
Cannot access or connect to shared folders
The case lamp is flashing red.
get an error message
hear a noise
Internal Hard Drive Not Recognized
RAID devices are not recognized on the network
I accidentally deleted shared files and folders
In the event of any of the above symptoms or problems, it is a priority to turn off the equipment and stop operating or working.As a result of doing simple things such as continuing to power on and power off and rebooting, the data stored in the RAID device is not only more difficult to recover, but also more likely to be in an unrecoverable situation.In the event of any of the above symptoms or problems, it is assumed that the internal HDD is experiencing a logical or physical failure, and you should also be aware that the act of trying to use it as usual is a dangerous operation to lose data.If you accidentally delete the necessary files or folders, the data will continue to be overwritten just by browsing other folders or creating new files as usual.If you need to recover or restore data from RAID, it′s your top priority to stop.
↓If you are having trouble starting the TerStation, click here.
AT DATA RECOVERY MEDIUM
Learn what to do if the TeraStation does not start.
https://www.adte.jp/rec/hdd/post-2223/
In some cases, problems such as suddenly not being able to put in shared folders, not being able to access TerStation, and not being able to move after moving may occur.Management software shows TerStation
Types of Faults that Require RAID Data Recovery
If there are any symptoms or problems with the hard drives or servers that are configured with RAID, it is estimated that the following failures are occurring:
Physical failure of RAID equipment
Logical failure of RAID equipment
1. Physical failure of RAID equipment
A physical failure is a failure caused by a physical failure or corruption of a hard drive in a RAID server.RAID problems are overwhelmingly caused by internal hard drive failures, and should be noted.In the event of a physical failure of the hard drive that is part of RAID, four essentials are required: クリーン dedicated environment such as clean room な deep expertise 高度 advanced technical capabilities 互換 procuring compatible parts.If you proceed with some work or operation by yourself, the condition will become serious, and if the symptoms appear immediately, the situation that could have been recovered quickly and cheaply may fall into an unrecoverableIf the data you have saved is important, if you can′t retrieve it, you need to solve the problem quickly, or if you want to reduce the cost, contact a professional data recovery company should be given priority.
·Examples of physical failure of RAID equipment that may require data recovery
1. RAID equipment does not boot, does not power on, 2. Cannot access a network hard drive or server built with RAID, 3. Cannot access or connect to a shared folder, 4. Blinking red, 5. Error message, 6. Noise, 7. Internal hard drive not recognized, 8. Not recognized on the network, etc.
2. Logical failure of RAID equipment
Logical failure is a failure caused by a programmed problem, human error, virus infection, system crash, etc., such as incorrect deletion, etc., although the hard drive or casing is fine or not broken.When a logical failure occurs, the RAID unit itself is often operational and often unaware of the failure.If you don′t notice a failure and continue to use RAID equipment, it can not only increase the difficulty of data recovery, but also make it difficult to recover itself.
·Examples of symptoms and problems that cause logical failure of RAID equipment and require data recovery
7. Internal HDD not recognized / 8. RAID device not recognized on network / 9. Wrongly deleted shared files and folders, etc.
Examples of Causes of Symptoms and Failures in RAID Equipment
The possible causes of symptoms and problems with RAID equipment are as follows:
Hard drive failure or failure
RAID Controller Card Failure or Defects
Problem with RAID configuration information
Virtualization Troubleshooting Disk Corruption
deterioration over time
effects of power outages and lightning strikes
vibrations and shocks were added
1. Hard drive failure or failure occurs
Problems with RAID devices are often caused by internal hard drive failures or failures.If you experience symptoms such as RAID equipment not starting, shared folders not being accessible, flashing red, noise, or error messages, you should think that the internal hard drive has failed.If the hard drive that is configuring RAID is broken or about to break, it is best to prioritize turning off the equipment and prevent deterioration of condition.In the event of a problem with the hard drives that make up RAID, repair and data recovery operations are essential: クリーン dedicated environment such as a clean room 高度 advanced technical capabilities 深い deep expertise 互換 procurement and replacement of compatible parts.It is difficult to deal with individuals, so you should consult a professional restoration company.
2. RAID controller card failure or malfunction
When building RAID with multiple HDDs, a component called a RAID controller is responsible for virtualizing multiple disks together to recognize and control them as a single drive.A RAID controller card is one of the boards and is often caused by damage to the controller card if the internal hard drive that is configured for RAID is not recognized or data cannot be accessed.Do not turn the RAID controller card on or off if it is faulty or damaged.When power and communication resume, the RAID controller card reads and writes a lot to the hard drive, leading to corruption, destruction of configuration information, and overwriting of data.Most of the causes of failure of the RAID controller card are (1) deterioration over time (2) shock and fall (3) thermal runaway (4) adhesion of foreign substances including dust and dust.Powering off equipment is a top priority in the event of a RAID controller failure.You may end up in an irreversible situation just by conducting electricity to do something.If your RAID controller card is defective or damaged, it is difficult for you to handle it personally, so leave it to the professional.
3. RAID configuration information is problematic
Be careful when you receive error messages such as RAID Configuration Error, RAID Configuration Corrupted, or RAID Collapse Mode.If the RAID device does not start and the data inside is inaccessible, do not do anything and turn off the unit.If you don′t do anything after an error occurs, data recovery is often possible quickly and cheaply.However, if the configuration information fails and the power is turned off or restarted, the configuration information may collapse and become irreparable.If the RAID configuration information is initialized upon reboot, it may be difficult to recover the data itself.If a RAID device fails or becomes unable to load, you should turn off the unit and consult a professional data recovery company.
4. Virtualization Troubleshooting Disk Corruption
RAID often uses specialized operating systems, and virtualized environments are becoming increasingly diverse.In the case of virtualization servers, it is often set in a special file format, and if a file is corrupted, the virtual disk itself will not be able to read.In the event of a virtual environment problem, you must attempt to recover from a virtualized state, and in the event of difficulty, analyze the symptoms of the disks on the original server before proceeding with the recovery.Therefore, if you proceed with the operation or work easily, you may end up in an irreversible situation.The best way to do nothing without trying to force yourself to move is to contact a professional restoration company if you have any difficulties or concerns.
5. Deterioration over time
If you have used a hard drive that is configured with RAID for a long time, it can often fail or fail due to aging.Recording media such as HDDs are also consumables, and if you experience problems after several years of operation, it is better to stop using them because of aging.The condition will become serious with simple operations such as continuing to energize when a failure is suspected due to aging, turning off the power, and restarting.
6. Effects of power outages and lightning strikes
After a power outage or lightning strike, problems such as the inability to start a RAID device or access a shared folder often occur.Power cycling after a power outage can often cause fatal damage to the chassis or internal hard drive.The best way to deal with this problem is to unplug the cable from the main body and prevent the current from flowing if there is any problem or symptom after a power outage or lightning strike.
7. Vibrations and shocks were added
When moving or remodeling, the RAID device is often shocked.If you experience symptoms or trouble after moving the position, do not touch the device any more.Networks, servers, and internal disks are very vulnerable to shock and vibration.If something goes wrong after moving the device, it is estimated that vibration or shock is added to the device, which leads to the occurrence of the symptom.Because the risk of data loss increases just by continuing to power on, you can start by turning off the power and unplugging the cable.
Learn how to restore RAID data when you want to.
When data recovery is required for RAID, an error message is displayed due to a failure or failure of one of the hard drives that make up the RAID, and the lights on the NAS or the server itself are flashing red.It is also important to check the status from the RAID Configuration Utility screen.However, trying RAID data recovery on your own is often a dangerous act to lose important data, so you should prioritize using a free consultation from a professional data recovery provider when you are in trouble or trouble.
How to use RAID data recovery software
US>Example Flow for RAID Data Recovery Using Restore Software
US>Examples of RAID Media Types that Recovery Software Can Restore
1. How to use RAID data recovery software
If the hard drive that is configured with RAID is not physically faulty, you may want to use the data recovery software to try to restore it.If you think the RAID device is experiencing symptoms due to aging, power failure, shock or fall, you should not choose how to use the software.RAID data recovery using software is only possible when there is a mild logical failure.Network HDDs and servers built and operated by RAID are often used by multiple people, so if you have important data, don′t want to fail, don′t want to recover, or want to save money, prioritize using free consultation from a professional data recovery company before using recovery software.It is better to avoid the consequences of using the software easily and regretting it.
2. Flow of RAID data recovery using restore software
The following is the way to use the restore software when you want to perform data recovery for RAID.If you want to restore the data without fail, if you can′t retrieve it, or if you want to restore the data at a low cost, stop and consult with a professional before proceeding.The risk of losing data increases if you proceed recklessly.·Things that need to be prepared in advance
①PC (Windows/Mac)
②Hard drives in a RAID device (such as a network hard drive or server such as a TeraStation or LinkStation or LANDISK) that you want to restore data to.
③data recovery software
④Cable for connecting a PC to a hard drive
·Examples of procedures for recovering RAID data using software
①search for recovery software
②download software
③Installing Recovery Software on a PC
④Select the drive you want to restore from the initial screen of the recovery software → Click Scan
⑤Scanned → Detected deleted files, etc. Scan the entire → drive
⑥Search for detected data and check on preview screen
⑦Select the data you want to restore → Click Recovery
⑧Once the deleted data, deleted folders, and files have been restored, the task is complete.
*Please note that if you don′t save the restored data outside of the original storage location, the data will be overwritten.
You may be able to restore data by trying to use the recovery software when data disappears from a RAID device or accidentally erases folders or files, but you may not be able to restore the files or folders you want, garbled characters, or only partially restored.Recovery software can only recover RAID data when there is a mild logical failure, and scanning software when there is a physical failure, including moderate or older logical failures, can often lead to severe conditions and unrecoverable conditions.Data stored in the RAID device is important, it will be a problem if it disappears, it may cause inconvenience to customers, I want to solve the problem quickly, and if I want to restore it at a low cost, it is better to prioritize using free consultation from a professional data recovery company.
3. Examples of RAID media types that can be restored by the recovery software
Since there are few recovery software that supports RAID and no free software is available, you will need to find a paid version to purchase it if you want to use the software to recover RAID.However, it is often impossible to restore even if you use paid restoration software. As a result of using the software, the condition often deteriorates.If you use the software easily because you think it′s easy to keep costs down, you may regret it.If you are concerned about recovery costs or want to recover quickly and cheaply, contact a professional data recovery company is a priority.
Example of a model where data can be restored using recovery software Example of media where data can be recovered
HDD/SSD Network HDD/SSD embedded in HDD, server, etc.
NAS(ネットワークHDD) TeraStation・LinkStation、Landisk・Soundgenic・RECBOX QNAP NAS(QNAP TS・QNAP HS・QNAP TBS・QNAP TVS) SynologyNAS(DiskStation・RackStation・DS)、エレコム NAS(NSB)、YANO NAS(N-RAID)、NETGEAR NAS(ReadyNAS)、ASUSTOR NAS(AS・LOCKERSTOR・NIMBUSTOR)ロジテックNAS(LSV) メルコシンクレッツ NAS(DELA)、Thecus NAS、ニューテックNAS(NEBBN・NESBN・NCDEN) マウスコンピューター(MousePro)、BIOS(PS)、Infortrend (EonNAS)、drobo(Drobo), Princeton (Digital Image EN) Bluesound (VAULT), IMATION (Data Appliance), Lenovo (Iomega), StoreJet Cloud, Hanwha (MvixBOX), WESTERN DIGITAL (WD Cloud), Panasonic (Technics), Corega (HDD BANK TERA), etc.
Server DELL (PowerEdge PowerVault), HP (ProLiant), FUJITSU Server PRIMERGY (Primary), IBM (TotalStorage), NEC (Express), New Tech Supremacy (Sprémacy), etc.
What to watch out for when you want to recover data from RAID
I often panic when something happens to the RAID device.When you want to retrieve or recover data from a RAID device such as a network hard drive or server, be careful not to:As a result of doing what you can easily do, you can often end up in a situation where you can recover quickly and cheaply, but you can′t recover.
without continuing to energize
Repeated power-on and reboots are not allowed.
Replacement or replacement of HDDs can lead to data loss of data
RAID rebuild (rebuild) is dangerous
Avoid connecting a hard drive to a PC alone
Do not replace the RAID card (controller card)
1. Do not continue to energize
The best solution is to turn off the power in the event of a RAID device failure and ensure that the condition remains the same.You may end up in a dangerous situation where you might lose data just by connecting the cables and continuing to energize.Let′s start by unplugging the cable so that the current doesn′t pass.
2. Repeated power-on/reboot is not allowed.
If the RAID device does not start, does not have access to shared folders, displays an error message, or the lamp on the main unit is flashing red or blinking red and cannot be used, do not cycle the power cycle or reboot.Power cycling or rebooting is one of the most stressful activities, and if internal hard drives or components fail or are damaged, the RAID controller will malfunction or cause new failures.As a result of simple actions, it is not only difficult to recover data, but also difficult to recover itself, so you need to be careful.When you′re in trouble, give priority to using free consultation from a professional data recovery company.Even if the power is turned off or restarted repeatedly, RAID data recovery has a lot of experience. Many companies with advanced technology can recover quickly and cheaply.If you want to keep costs down, let′s start by contacting them when you′re worried.
3. Replacement or replacement of HDD can lead to loss of data
Recognize that removing or replacing a hard drive that is configured with RAID from a NAS or server is a dangerous activity.RAID uses multiple disks to make it look like a single drive, but when one of the multiple disks fails, the other disks are likely to fail or break.This may be due to the fact that several disks built into the NAS or server are manufactured at the same time.If one of the disks is broken, it is better to think that the other disks are also broken and move to avoid the risk of data loss.If a hard drive that is configured for RAID fails or fails, it will automatically rebuild (rebuild) the RAID after removing, replacing, or replacing the disk with another hard drive, increasing the risk of data loss and difficult recovery.
4. RAID rebuild (rebuild) is dangerous
When a RAID rebuild (rebuild) or a hard drive is replaced and automatically rebuilt (rebuild), it often stops or fails in the middle, and you need to be careful.Reconstruction (rebuild) is one of the most demanding behaviors on the hard drive, which often results in a single disk failure leading to multiple failures.Also, it is better to be aware that reconstruction (rebuild) often fails, causing RAID corruption, overwriting data, and other operations that are at high risk for data loss.You may want to retrieve or recover data, but reconstruction (rebuild) not only increases the difficulty of recovery, but you may also end up in an unrecoverable situation.RAID reconstruction (rebuild) itself is one of the operations that requires expertise and experience, and if you proceed with it easily, you may regret it.If you really want to replace, replace, or rebuild (rebuild) your hard drive, consult a professional data recovery company before proceeding.
↓ What is a RAID rebuild (rebuild)? Risk and failure examples are also detailed below.
AT DATA RECOVERY MEDIUM
RAID rebuild (rebuild) failed or Method
https://www.adte.jp/rec/hdd/post-1549/
If a hard drive that is configured for RAID is damaged, data can be recovered by replacing the hard drive and reconfiguring it (rebuilding), and many of you may recognize that the system can be restored to its original state.However, reconstruction itself is a high risk.
5. Avoid connecting the HDD to the PC
In the event of a problem, you may think about taking an internal hard drive from a NAS or server that is building RAID and connecting it directly to your computer to retrieve and recover data.However, be aware that even if you connect a hard drive that is configured with RAID to a PC, you will not be able to see the data used and inside like an external hard drive.Also, connecting a hard drive to a personal computer will allow data to be overwritten, error messages will be displayed, file system corruption will be accelerated, failure conditions will not be severe, and the risk of data loss will increase.Also, if you don′t want to lose data, you shouldn′t take out the disk itself, as RAID rebuilds will also take place when you return the hard drive to the NAS or server.
6. Do not replace the RAID card (controller card)
Do not rush to replace a new RAID card if the RAID card (controller card) fails.RAID cards are often special and require deep expertise to find and replace compatible RAID cards.If you replace it with a wrong RAID card, the data may disappear or you may not be able to see the data.Also, if you reconfigure (rebuild) RAID with the wrong RAID card, it will not only increase the difficulty of data recovery, but it will also become difficult to recover itself.Large tower, rack, and blade servers have specialized RAID cards, so you need to be careful handling.When a RAID card problem occurs, the file system on the hard drive is often at the same time.In this case, even if there is no problem with the compatibility of the RAID card, there are many times when you are confused because you cannot see the data.If you think that you don′t want to lose, fail, or be unable to retrieve your data, you should leave it to a professional data recovery company.
How to recover or restore data by RAID type
There are many different types of RAID, and the recovery methods vary depending on the type.Below are some of the main types of RAID recovery methods.
How to Recover RAID 0
How do I recover RAID 1?
How do I recover RAID 5 and 6?
1. How to Recover RAID 0
If you run a NAS or server with RAID 0, you will not be able to use it if even one internal hard drive fails.An error message is displayed.·The lamp is blinking red.·After using it for a long time, it may deteriorate over time.·If there is a power outage or lightning strike, turn off the power of the hard drive itself.If a NAS built with RAID 0 fails, it is best to contact a specialized data recovery provider.
↓ Please refer to the following when data recovery for RAID 0 is required.
AT DATA RECOVERY MEDIUM
How do I recover data in the event of a RAID 0 recovery or failure?
https://www.adte.jp/rec/hdd/post-2729/
There are many cases where there are sudden problems with the equipment used to share data in the company or at home, such as the equipment operating under RAID 0 does not start, the equipment cannot be accessed, the access lamp is not lit, etc.We′re working on RAID.
2. How to Recover RAID 1
It is a type of RAID that does not matter if one of the two RAID units is suspected to have been damaged or failed, but it is difficult to notice the failure, so be careful.Both of them may fail as a result of continuing to operate without noticing the failure of one disk.Let′s check the operation regularly.In the event of a suspected failure of a disk running on RAID 1, data recovery may be accomplished by simply backing up the data and replacing the failed hard drive.RAID rebuild (rebuild) also occurs automatically.However, if one disk fails, the other disk is broken or is about to break, and it is important to note that replacing the hard drive and rebuilding the RAID (rebuild) will cause both of them to break completely and become serious.If you think that replacing a hard drive itself is a risk of losing data, and you are worried about losing or losing your stored data, you should give priority to consulting a professional data recovery company before replacing a hard drive.It′s better to avoid the consequences of regretting the work by proceeding with it easily.Also, using free consultation from professionals will help you solve your worries quickly and save you money on restoration costs.
3. How do I recover RAID 5 and 6?
If you run a NAS or server with at least 3 RAID 5 and at least 4 RAID 6 to build RAID, data recovery is expected to be easy in the event of a single RAID 5 and 2 RAID 6 disk failure.RAID 5 and RAID 6 can be recovered by simply replacing a broken hard drive, just like RAID 1 recovery, but as mentioned in ′What to Be careful about when you want to recover RAID data,′ replacing a hard drive itself is also a dangerous act to lose data.If one hard drive fails, most of the time other hard drives have already failed or are about to break, and as a result of replacing the hard drive, the condition often becomes more severe.In the event of multiple hard drives being destroyed, it will be difficult to recover data personally, whether it be RAID 5 or RAID 6.It is better to avoid making recovery difficult or making recovery difficult because the HDD was replaced easily.If the data contained in the RAID device is important, I want to solve the problem quickly, I don′t want to fail, I want to run out of files and folders, and I want to reduce costs, I will start by using the data recovery company′s free consultation before proceeding.It will lead to the desired result immediately.
↓See also if you would like to perform data recovery for RAID 5.
AT DATA RECOVERY MEDIUM
If you need to recover data from RAID 5, provide examples of failures and tips on how to deal with them!
https://www.adte.jp/rec/hdd/post-2599/
I can′t access the NAS that I was running with RAID 5, the lamp is blinking red, an error message is displayed, the server may be broken, the internal hard drive has failed, and so on, the server I am using with RAID 5 suddenly has trouble.
Learn how RAID can recover and restore data
In the event of a problem or failure of a RAID device, the response will vary depending on whether you want to recover or restore data stored on a NAS, server, or internal hard drive, or whether you want the device to boot or return to use without data.′For those who need or value data, go to the ′′Data Recovery Service Provider.′′′If you don′t need data or only want to repair the case, consider consulting with the ′buyer or manufacturer.′
How to send it to a store or manufacturer′s repair shop
How to consult a data recovery service provider
1. How to send it to a store or manufacturer′s repair shop
If you don′t need data stored on a RAID device, NAS, server, or internal hard drive, and you only want to repair the case or disk, or if you want it back to work, consider sending it to the store or manufacturer′s repair shop.If you send it to the store or the manufacturer′s repair, you need to be aware that the stored data is not guaranteed and the data is initialized and disappeared or disappeared.Repairs are intended to be returned to service by replacing or repairing broken equipment or damaged parts.Also, if you send it to the store or manufacturer, it will take a long time to repair it, not a few weeks, so you need to be careful.It is better to think only when you don′t need data or have enough time to send it to the store or the manufacturer′s repair.If the data inside is more important than the RAID device running, or if you want to prioritize recovery or rescue, choose another method.
2. How to consult with a data recovery service provider
If you need data from a RAID device, NAS, server, or internal hard drive, or if you′re in trouble if it′s gone or you can′t take it out, choose a way to talk to a data recovery service provider.When you consult with a data recovery provider, you have deep expertise and advanced technology to identify the cause, type of failure, and location of damage, so you can respond to physical or logical failures.When choosing a data recovery service provider, it is recommended to check if the company has ′original technology′ or ′AI technology.′It is a standard for determining whether you are a highly skilled company.Because of its advanced technological capabilities, recovery time can be reduced, and quick response and recovery costs can be reduced.By any chance, if you send it to a company that doesn′t have technical capabilities, it will not only be able to recover and retrieve the data, but it may also lead to deterioration of the condition.It is not possible for any company to recover in the same way, and there is a big difference in service content and technical capabilities between companies.Therefore, it is very important to choose the first company you request.
How to Choose a Data Recovery Service Provider
When a hard drive, NAS, or server that is configured with RAID is experiencing symptoms or failures, it is common to panic.When you are not sure which vendor to contact or are worried about how to find it, pay attention to the following points and make a decision.
Does the organization have its own technology or AI technology and is performing restoration work with advanced technology?
Is the speed and response to restoration fast?
Is the restoration fee and plan specified on the website?
Are information confidentiality obligations and security controls in place?
Does the organization work in a dedicated environment such as a clean room?
availability of response and restoration results
Priority should be given to contact the data recovery service provider if the data stored in the RAID device is important, need to be retrieved, want to solve the problem as soon as possible, want to minimize disruption to business, want to restore at low cost, worry about recovery costs.Advanced Technology is a recommended data recovery company that meets all 1 to 6.Advanced technology enables fast response and low cost data recovery, and has a proven track record of RAID problems.
Summary - In case of trouble
If you experience problems such as hard drives, NASs, or servers that are configured with RAID and cannot boot, files and folders are inaccessible, an error message is displayed, or the lamp is flashing red, turn off the computer, and use a free consultation with a professional data recovery company.If the recording medium, such as the RAID device itself or the internal hard drive, fails, it is extremely dangerous to turn the power on and off.The condition will deteriorate, and not only will it increase the difficulty of recovery, but it will also increase the risk of data loss.When you′re having trouble with RAID, you need deep expertise and technical expertise to identify and respond appropriately, so choosing a company is important to ensure data is retrieved.Advanced technology has its own technology and AI technology, and its advanced technology enables quick recovery and low cost data recovery.I recommend it because it responds kindly to questions.