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RAID rebuild (rebuild) failed or Method
LemonDKel
2022. 8. 4. 09:22
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, did you know that reconstruction (rebuild) is itself a high-risk task?RAID reconfiguration (rebuild) is something that needs to be done with caution, as there is a risk of deteriorating conditions and data disappearing while reading manuals and instructions.Here are some symptoms, failures, precautions to take when you have a RAID problem and how to recover from a rebuild.
Table of Contents
1. What is RAID?
1.1. What is RAID Rebuild?
1.2. Examples of symptoms and failures caused by RAID reconstruction (rebuild)
1.2.1.1. Disk failures increase from one to multiple
1.2.2.2. The rebuild fails if it fails during the rebuild.
1.2.3.3. Rebuild Continues
1.2.4.4. Data Disappears/Disappears
1.3. Before Rebuilding
1.3.1.1. Backing Up
1.3.2.2. Prepare disks that do not contain data and can operate normally
1.3.3.3. Make a note of the hard drive serial number and take a photo
1.3.4.4. After the system is shut down
1.3.5.5. Check Disk Order
1.3.6.6. Hard drive recognition is not allowed.
1.4. Rebuild Considerations
1.5. If disk replacement fails to recover
1.5.1.1. RAID is already damaged prior to replacement
1.5.2.2. Initialize and repair after replacement
1.6. How to recover data from RAID when it cannot be rebuilt
1.6.1.1. Utilization of data recovery software
1.6.2.2. Consultation with a specialized data recovery company
1.7. Differences between deployment and recovery
2. Summary - If you are still in trouble, don′t do anything unnecessary and go to the restoration company
What is RAID?
RAID is a technology that uses multiple disks (HDDs/SSDs) and allows multiple drives to be recognized and viewed as a single drive in combination.The official name for RAID stands for Redundant Array of Inexpensive Disks and is called Reid.The administrator configures the RAID configuration settings on the server or network hard drive (NAS) so that the equipment generates parity and builds RAID.Parity is a code that is automatically generated to detect and correct errors when recording/receiving/delivering data.The advantages of using RAID in NAS and servers are largely divided. RA Access to and recover data even if HDD failure occurs depending on RAID mode/type. データ Access to, process, and write data faster. データ The amount of data recorded is expected to increase.
What is RAID Rebuild?
A RAID rebuild is the restoration and reconstruction of data on a failed hard drive from a single failed hard drive while using multiple hard drives such as RAID 5, RAID 6, or RAID 1.In general, when a hard drive fails and data in a NAS or server becomes inaccessible, it is said that reconstruction (rebuild) will recover the data.However, reconstruction (rebuild) can worsen symptoms, and if it fails, it will be impossible to recover data, and the rebuild itself will not be easy, so you need to be careful.
↓ If you would like to perform a data recovery for RAID 5, please visit here as well.
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.
Symptoms and Failures of RAID Rebuilding (Rebuild)
1. Disk failures increase from one to several
2. If a failure occurs during the rebuild, the rebuild will fail.
3. The situation continues where the rebuild is not finished.
4. Data disappears and disappears
1. Disk failures increase from one to several
Because multiple disks in NAS, servers, etc. are often made at the same time, one disk often breaks at the same time.It is recommended to back up your data with the assumption that the timing of failure is often the same depending on usage time and life, and that if one disk is broken, the other disk may also be damaged.
2. If a failure occurs during a rebuild, the rebuild fails.
As noted in 1. , multiple disks often break at the same time, so other hard drives often break during a rebuild, and the rebuild itself often fails.In some cases, the rebuild operation may stop in the middle.The rebuild will fail even if it stops halfway.Because rebuild failures occur frequently, it is also a good idea not to do so if your data is important.
3. The situation continues where the rebuild is not finished.
Similar to the failed disk in 2. It may be possible to load the damaged disk and not complete the rebuild.This can also lead to hard drive corruption because it is always too much of a burden while the rebuild is not complete.Keep in mind that if the rebuild continues, the hard drive will no longer be recognized, no longer responsive, will be disconnected from the RAID configuration, and new symptoms such as NAS and server failure may increase.
4. Data disappears and disappears
If the rebuild fails or stops halfway, ディスク the disk configuration will collapse が the data will fall apart 書き different data will be written 違う different data will be overwritten 元々 different mode/type of RAID originally set モード incorrectly recognized mode/type.As a result, the stored data may disappear, disappear, and it may be difficult to recover the data.
↓ Learn more about RAID types and recovery methods
AT DATA RECOVERY MEDIUM
How to recover and restore data with RAID | Learn how to do it and take notes!
https://www.adte.jp/rec/hdd/post-748/
One way to store important data is to use a RAID configured device.There are different types of RAID, each operating and recovery methods.Learn how to recover and respond to RAID failures such as inaccessible, inaccessible, unable to connect, unable to enter shared folders, data disappeared, and errors.
Prior to reconfiguring (Rebuild)
If you reset or delete the RAID configuration information, the data may disappear or be initialized, so it is most important not to move any more in case of trouble.If the data in the disk is overwritten when the configuration information is reset, it cannot be undone.Rebuilding is a risky business.Please pay attention to the following when you handle it yourself.
1. Backing Up
2. Prepare disks that do not contain data and can operate normally
3. Note the serial number of the hard drive and take a picture
4. After the system is shut down,
5. Check the order of disks
6. Hard drive recognition is not allowed by itself
1. Backing Up
It′s a good time to back up the first hard drive failure or after using RAID equipment for several years.If more disks fail during a rebuild, the NAS or server may not be able to boot.If a hard drive fails, you may need to consult a professional recovery company first to avoid problems because you accidentally delete the data while trying to get a backup.
2. Prepare disks that do not contain data and can operate normally
US>If one of the multiple disks configuring RAID is damaged, a new disk must be prepared to replace the damaged disk.Get something that doesn′t contain data/can work properly.
3. Note the serial number of the hard drive and take a picture
Keeping a serial number in mind can help prevent accidental insertion of a broken hard drive and a working hard drive that you plan to replace.Leave a note or take a picture of the serial number in advance.
4. After the system is shut down,
When replacing disks (hot spares) while running RAID, be careful not to accidentally remove a working disk.If the system is down, there is no problem if you remove it by mistake, but if you remove a disk that is working properly while the system is running, the data will disappear, and the hard drive may fail.Replacement should be done after the system is shut down.
5. Check the order of disks
When replacing a failed hard drive with a new working hard drive, be careful not to mistake the order.If you reconstruct (rebuild) the data in the wrong order, the incorrect information will be overwritten on top of the stored data.As a result, it will be difficult to recover data, so you should check the order carefully.
6. Hard drive recognition is not allowed by itself
Even if you take the defective hard drive out of the NAS or server and connect it directly to the computer, you cannot access the stored data.Also, when you connect directly to your computer, you may be asked, ′Do you want to format it?′ So be careful not to press ′Yes′.After formatting, the stored data will be erased, and even if you try to build RAID, you will not be able to read the data.Avoid being recognized alone because data recovery can also be difficult.
Points to Note for Reconfiguration (Rebuilds
If you make a mistake, the data will disappear.If you′re not confident in your work, or if you′re using a NAS or server for a long time, consider leaving it to a data recovery company.
1. When configured with RAID 5 or RAID 6, more than one disk is damaged and cannot be undone
2. RAID configuration information will be corrupted if the equipment is turned on and off during reconstruction (rebuild).
3. If more than one disk is reseated during a rebuild, configuration information will be corrupted.
4. During the rebuild, the user experience and operation time such as accessing/backing up/displaying the configuration screen will be increased.
5. Access to data during a rebuild often leads to a rebuild failure
6. No RAID redundancy during rebuild
7. RAID array check is nondisruptive
If disk replacement fails to recover
The following are possible reasons for not being able to recover after a disk replacement.
1. RAID has already been damaged prior to replacement
2. Initialize and repair after replacement
1. RAID has already been damaged prior to replacement
Be aware that data cannot be recovered by replacing a disk if the RAID is damaged after a disk failure and prior to a rebuild.NAS and servers often have systems (hot swaps) that allow them to replace and reseat disks while they are powered on.Therefore, it is estimated that the equipment should remain operational until the user shuts down, but the RAID itself has already been damaged when the power is off and the server is down.Replacing disks alone does not improve the problem when this situation occurs.
↓Here are the solutions to RAID corruption.
AT DATA RECOVERY MEDIUM
What is RAID Collapse? Introduce the cause of the outbreak and how to deal with it.
https://www.adte.jp/rec/hdd/post-1133/
When using equipment such as a server, RAID corruption mode is displayed on the management screen, data is no longer accessible, data is no longer read or written, and what number of HDD is broken is displayed.Here are some symptoms, causes, and solutions to help resolve problems as soon as possible in the event of a RAID collapse.
2. Initialize and repair after replacement
When initializing and repairing a disk after replacement, the entire data area is initialized and all data disappears.It is difficult for individuals to perform restoration when this situation is happening.Turn off your equipment and contact a specialized data recovery provider.
How do I recover data from RAID when I can′t rebuild?
Here′s what to do if you can′t rebuild.
1. Utilization of data recovery software
2. Consultation with a specialized data recovery company
1. Utilization of data recovery software
If you are unable to recover due to corruption of RAID configuration information or a rebuild failure, you may want to use the recovery software to try to resolve the problem.However, while the use of recovery software is easy to try, care must be taken because the use of the software may cause data to be overwritten and the condition to deteriorate.Also, be aware that you cannot use software to recover data in the event of a physical failure of parts such as hard drives.There are many cases where you find software that matches your problems and symptoms, and manuals and explanations are written only in English, so there are concerns that you may have more problems.It is also important not to worry about using software when storing important data and important materials on NAS or server.
2. Consultation with a specialized data recovery company
If rebuilding itself is a risky business and the data you have stored is important or difficult to run out of, you should give priority to consulting a specialist recovery company as soon as possible.If you leave it to a specialized company, you can save time and effort, so you can solve problems quickly without losing important data.In many cases, identifying the cause of a RAID problem and recovering it itself are difficult, and in the event of a symptom or problem, turn off the equipment.It prevents the condition from deteriorating.Professional data recovery providers have the expertise and recovery technology to handle RAID rebuilds (rebuilds) problems.If you want to determine the technical capabilities of a recovery company, it will be easier to consider if you have AI technology.
difference between deployment and recovery
RAID often uses a different operating system (such as Windows or Mac OS) than most PCs (such as Linux or Unix) and is often difficult to recover data individually.Because the knowledge and technology required for RAID construction and data recovery work are different, it is often not possible to recover because it has been built, and careful judgment and response are also required.Even if you rebuild while reading the instructions, it often doesn′t end normally or it can′t be restored.Because the response method varies depending on the type of equipment, RAID mode, and symptoms, if you are worried about the data you have saved, you should consult a specialized recovery company first.
↓ Learn more about what a professional recovery company did when a hard drive with RAID failed.
AT DATA RECOVERY MEDIUM
Hard Drive Recovery Technical Information
https://www.adte.jp/rec/hdd/post-1867/
You may be surprised to find that the network hard drives (NAS) and hard drives (hard drives) that make up RAID are similar to PCs.Hard disk is the best when connected to a PC in an external case or powered directly into a PC
Summary - If you are still in trouble, don′t do anything unnecessary and go to the restoration company
Reconfiguration (rebuild), one of the RAID recovery tasks, is a high risk that data recovery will be difficult if it is not successful.If you lose important data by proceeding with rebuilds that often fail even if you follow the manual or instructions, and you experience problems with RAID before you feel sad, or if your hard drive fails, you should consult a professional data recovery company as soon as possible.Advanced technology has AI technology to address all RAID symptoms, failures, and problems, including rebuild problems.If you are having trouble, please feel free to contact us via free consultation.
Table of Contents
1. What is RAID?
1.1. What is RAID Rebuild?
1.2. Examples of symptoms and failures caused by RAID reconstruction (rebuild)
1.2.1.1. Disk failures increase from one to multiple
1.2.2.2. The rebuild fails if it fails during the rebuild.
1.2.3.3. Rebuild Continues
1.2.4.4. Data Disappears/Disappears
1.3. Before Rebuilding
1.3.1.1. Backing Up
1.3.2.2. Prepare disks that do not contain data and can operate normally
1.3.3.3. Make a note of the hard drive serial number and take a photo
1.3.4.4. After the system is shut down
1.3.5.5. Check Disk Order
1.3.6.6. Hard drive recognition is not allowed.
1.4. Rebuild Considerations
1.5. If disk replacement fails to recover
1.5.1.1. RAID is already damaged prior to replacement
1.5.2.2. Initialize and repair after replacement
1.6. How to recover data from RAID when it cannot be rebuilt
1.6.1.1. Utilization of data recovery software
1.6.2.2. Consultation with a specialized data recovery company
1.7. Differences between deployment and recovery
2. Summary - If you are still in trouble, don′t do anything unnecessary and go to the restoration company
What is RAID?
RAID is a technology that uses multiple disks (HDDs/SSDs) and allows multiple drives to be recognized and viewed as a single drive in combination.The official name for RAID stands for Redundant Array of Inexpensive Disks and is called Reid.The administrator configures the RAID configuration settings on the server or network hard drive (NAS) so that the equipment generates parity and builds RAID.Parity is a code that is automatically generated to detect and correct errors when recording/receiving/delivering data.The advantages of using RAID in NAS and servers are largely divided. RA Access to and recover data even if HDD failure occurs depending on RAID mode/type. データ Access to, process, and write data faster. データ The amount of data recorded is expected to increase.
What is RAID Rebuild?
A RAID rebuild is the restoration and reconstruction of data on a failed hard drive from a single failed hard drive while using multiple hard drives such as RAID 5, RAID 6, or RAID 1.In general, when a hard drive fails and data in a NAS or server becomes inaccessible, it is said that reconstruction (rebuild) will recover the data.However, reconstruction (rebuild) can worsen symptoms, and if it fails, it will be impossible to recover data, and the rebuild itself will not be easy, so you need to be careful.
↓ If you would like to perform a data recovery for RAID 5, please visit here as well.
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.
Symptoms and Failures of RAID Rebuilding (Rebuild)
1. Disk failures increase from one to several
2. If a failure occurs during the rebuild, the rebuild will fail.
3. The situation continues where the rebuild is not finished.
4. Data disappears and disappears
1. Disk failures increase from one to several
Because multiple disks in NAS, servers, etc. are often made at the same time, one disk often breaks at the same time.It is recommended to back up your data with the assumption that the timing of failure is often the same depending on usage time and life, and that if one disk is broken, the other disk may also be damaged.
2. If a failure occurs during a rebuild, the rebuild fails.
As noted in 1. , multiple disks often break at the same time, so other hard drives often break during a rebuild, and the rebuild itself often fails.In some cases, the rebuild operation may stop in the middle.The rebuild will fail even if it stops halfway.Because rebuild failures occur frequently, it is also a good idea not to do so if your data is important.
3. The situation continues where the rebuild is not finished.
Similar to the failed disk in 2. It may be possible to load the damaged disk and not complete the rebuild.This can also lead to hard drive corruption because it is always too much of a burden while the rebuild is not complete.Keep in mind that if the rebuild continues, the hard drive will no longer be recognized, no longer responsive, will be disconnected from the RAID configuration, and new symptoms such as NAS and server failure may increase.
4. Data disappears and disappears
If the rebuild fails or stops halfway, ディスク the disk configuration will collapse が the data will fall apart 書き different data will be written 違う different data will be overwritten 元々 different mode/type of RAID originally set モード incorrectly recognized mode/type.As a result, the stored data may disappear, disappear, and it may be difficult to recover the data.
↓ Learn more about RAID types and recovery methods
AT DATA RECOVERY MEDIUM
How to recover and restore data with RAID | Learn how to do it and take notes!
https://www.adte.jp/rec/hdd/post-748/
One way to store important data is to use a RAID configured device.There are different types of RAID, each operating and recovery methods.Learn how to recover and respond to RAID failures such as inaccessible, inaccessible, unable to connect, unable to enter shared folders, data disappeared, and errors.
Prior to reconfiguring (Rebuild)
If you reset or delete the RAID configuration information, the data may disappear or be initialized, so it is most important not to move any more in case of trouble.If the data in the disk is overwritten when the configuration information is reset, it cannot be undone.Rebuilding is a risky business.Please pay attention to the following when you handle it yourself.
1. Backing Up
2. Prepare disks that do not contain data and can operate normally
3. Note the serial number of the hard drive and take a picture
4. After the system is shut down,
5. Check the order of disks
6. Hard drive recognition is not allowed by itself
1. Backing Up
It′s a good time to back up the first hard drive failure or after using RAID equipment for several years.If more disks fail during a rebuild, the NAS or server may not be able to boot.If a hard drive fails, you may need to consult a professional recovery company first to avoid problems because you accidentally delete the data while trying to get a backup.
2. Prepare disks that do not contain data and can operate normally
US>If one of the multiple disks configuring RAID is damaged, a new disk must be prepared to replace the damaged disk.Get something that doesn′t contain data/can work properly.
3. Note the serial number of the hard drive and take a picture
Keeping a serial number in mind can help prevent accidental insertion of a broken hard drive and a working hard drive that you plan to replace.Leave a note or take a picture of the serial number in advance.
4. After the system is shut down,
When replacing disks (hot spares) while running RAID, be careful not to accidentally remove a working disk.If the system is down, there is no problem if you remove it by mistake, but if you remove a disk that is working properly while the system is running, the data will disappear, and the hard drive may fail.Replacement should be done after the system is shut down.
5. Check the order of disks
When replacing a failed hard drive with a new working hard drive, be careful not to mistake the order.If you reconstruct (rebuild) the data in the wrong order, the incorrect information will be overwritten on top of the stored data.As a result, it will be difficult to recover data, so you should check the order carefully.
6. Hard drive recognition is not allowed by itself
Even if you take the defective hard drive out of the NAS or server and connect it directly to the computer, you cannot access the stored data.Also, when you connect directly to your computer, you may be asked, ′Do you want to format it?′ So be careful not to press ′Yes′.After formatting, the stored data will be erased, and even if you try to build RAID, you will not be able to read the data.Avoid being recognized alone because data recovery can also be difficult.
Points to Note for Reconfiguration (Rebuilds
If you make a mistake, the data will disappear.If you′re not confident in your work, or if you′re using a NAS or server for a long time, consider leaving it to a data recovery company.
1. When configured with RAID 5 or RAID 6, more than one disk is damaged and cannot be undone
2. RAID configuration information will be corrupted if the equipment is turned on and off during reconstruction (rebuild).
3. If more than one disk is reseated during a rebuild, configuration information will be corrupted.
4. During the rebuild, the user experience and operation time such as accessing/backing up/displaying the configuration screen will be increased.
5. Access to data during a rebuild often leads to a rebuild failure
6. No RAID redundancy during rebuild
7. RAID array check is nondisruptive
If disk replacement fails to recover
The following are possible reasons for not being able to recover after a disk replacement.
1. RAID has already been damaged prior to replacement
2. Initialize and repair after replacement
1. RAID has already been damaged prior to replacement
Be aware that data cannot be recovered by replacing a disk if the RAID is damaged after a disk failure and prior to a rebuild.NAS and servers often have systems (hot swaps) that allow them to replace and reseat disks while they are powered on.Therefore, it is estimated that the equipment should remain operational until the user shuts down, but the RAID itself has already been damaged when the power is off and the server is down.Replacing disks alone does not improve the problem when this situation occurs.
↓Here are the solutions to RAID corruption.
AT DATA RECOVERY MEDIUM
What is RAID Collapse? Introduce the cause of the outbreak and how to deal with it.
https://www.adte.jp/rec/hdd/post-1133/
When using equipment such as a server, RAID corruption mode is displayed on the management screen, data is no longer accessible, data is no longer read or written, and what number of HDD is broken is displayed.Here are some symptoms, causes, and solutions to help resolve problems as soon as possible in the event of a RAID collapse.
2. Initialize and repair after replacement
When initializing and repairing a disk after replacement, the entire data area is initialized and all data disappears.It is difficult for individuals to perform restoration when this situation is happening.Turn off your equipment and contact a specialized data recovery provider.
How do I recover data from RAID when I can′t rebuild?
Here′s what to do if you can′t rebuild.
1. Utilization of data recovery software
2. Consultation with a specialized data recovery company
1. Utilization of data recovery software
If you are unable to recover due to corruption of RAID configuration information or a rebuild failure, you may want to use the recovery software to try to resolve the problem.However, while the use of recovery software is easy to try, care must be taken because the use of the software may cause data to be overwritten and the condition to deteriorate.Also, be aware that you cannot use software to recover data in the event of a physical failure of parts such as hard drives.There are many cases where you find software that matches your problems and symptoms, and manuals and explanations are written only in English, so there are concerns that you may have more problems.It is also important not to worry about using software when storing important data and important materials on NAS or server.
2. Consultation with a specialized data recovery company
If rebuilding itself is a risky business and the data you have stored is important or difficult to run out of, you should give priority to consulting a specialist recovery company as soon as possible.If you leave it to a specialized company, you can save time and effort, so you can solve problems quickly without losing important data.In many cases, identifying the cause of a RAID problem and recovering it itself are difficult, and in the event of a symptom or problem, turn off the equipment.It prevents the condition from deteriorating.Professional data recovery providers have the expertise and recovery technology to handle RAID rebuilds (rebuilds) problems.If you want to determine the technical capabilities of a recovery company, it will be easier to consider if you have AI technology.
difference between deployment and recovery
RAID often uses a different operating system (such as Windows or Mac OS) than most PCs (such as Linux or Unix) and is often difficult to recover data individually.Because the knowledge and technology required for RAID construction and data recovery work are different, it is often not possible to recover because it has been built, and careful judgment and response are also required.Even if you rebuild while reading the instructions, it often doesn′t end normally or it can′t be restored.Because the response method varies depending on the type of equipment, RAID mode, and symptoms, if you are worried about the data you have saved, you should consult a specialized recovery company first.
↓ Learn more about what a professional recovery company did when a hard drive with RAID failed.
AT DATA RECOVERY MEDIUM
Hard Drive Recovery Technical Information
https://www.adte.jp/rec/hdd/post-1867/
You may be surprised to find that the network hard drives (NAS) and hard drives (hard drives) that make up RAID are similar to PCs.Hard disk is the best when connected to a PC in an external case or powered directly into a PC
Summary - If you are still in trouble, don′t do anything unnecessary and go to the restoration company
Reconfiguration (rebuild), one of the RAID recovery tasks, is a high risk that data recovery will be difficult if it is not successful.If you lose important data by proceeding with rebuilds that often fail even if you follow the manual or instructions, and you experience problems with RAID before you feel sad, or if your hard drive fails, you should consult a professional data recovery company as soon as possible.Advanced technology has AI technology to address all RAID symptoms, failures, and problems, including rebuild problems.If you are having trouble, please feel free to contact us via free consultation.