How to repair a damaged partition on a data drive?

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  1. Posts : 11,627
    Windows11 Home 64bit v:23H2 b:22631.3374
       #11

    mrpink said:
    do you know what my 2 cents means? it means my opinion is only worth 2 cents... please keep your smiley with you.
    1. your post didn't appear to be relevant to ops problem.
    2. DIRECTLY from experience. after using partition recovery on a raw drive, my files became corrupt.
    3. absolutely happened to me again. same drive. bad controller.

    i hope op doesn't lose his data and his drive. thats the goal. good luck to op.
    I know that your opinion is worth only a miserly 2 cents. So the saying keep it yourself.

    "your post didn't appear to be relevant to ops problem."

    Exactly the opposite. Your post is not relevant to the OP's problem. If you had cared to read the previous posts, I had told that it is not a partition lost problem. OP's Drive has a drive letter G: and hence no partition was lost and so there is absolutely no need for Partition Recovery. Why are you bringing in Partition Recovery and your experience with Partition Recovery? Totally irrelevant. ( As you can see TestDisk shows two partitions one MSR and one Data partition. We have not performed any Partition Recovery operations. TestDisk merely read the Partition Tables in sector 2 ( GPT Disk) and has presented the two existing partitions (MSR and Data) and we are trying to find the status of the Volume Boot Record at the start sector of the Data Partition.. If the Volume boot record is bad or the MFT is corrupted the partition can become RAW. )

    "DIRECTLY from experience. after using partition recovery on a raw drive, my files became corrupt."

    1. As aforesaid, we are not not attempting Partition recovery. We know the partition exists by virtue of the fact it has a drive letter G:.
    2. It was not partition recovery that corrupted your files. Your files got corrupted due to other reasons - a failing drive. Do you know why partitions are lost? And what happens when you recover partitions? Listen : If the partition table/s in sector 0 ( in MBR disk) or the partition table/s in Sector 2 and subsequent 31 sectors in a GPT disk, get/s corrupted , the partition/s become/s RAW. The Partition Recovery software scans the drive, reads the volume boot records at the start sector of each partition/s and rewrites the partition table in sector 0 or sector 2 to 33 as the case may be. It does not do anything to data in the drive. It does not write anything in the data area.


    "absolutely happened to me again. same drive. bad controller."

    So you know why your files got corrupted and why it happened again- a failing hard drive.. Partition recovery did not corrupt your files.

    Do not make universal statements based on your singular experience. Thousands of users had performed Partition Recovery without losing their data, and one tree does not make a wood.

    File system corruption can make a disk/ partition RAW. That is what we are trying to find and correct ( if possible) in OP's case .

    Keep watching.
    Last edited by jumanji; 16 Jan 2021 at 07:22.
      My Computer


  2. Posts : 11,627
    Windows11 Home 64bit v:23H2 b:22631.3374
       #12

    Hi @NormAtHome

    I have just included two screenshots to my post#7.

    Post the screenshot of screen 6. I will mostly be online till 23hours - my time
    Last edited by jumanji; 16 Jan 2021 at 06:29.
      My Computer


  3. Posts : 46
    Windows 10 Pro
    Thread Starter
       #13

    How to repair a damaged partition on a data drive


    I may not have made this clear in my original post but this is purely a data drive that I use in the hot swap tray (that I pictured in my original post), it is not bootable and the boot option isn't show on the fifth screen; only Type, Image Creation and Quit:
    How to repair a damaged partition on a data drive?-testdisk-5.jpg
      My Computer


  4. Posts : 11,627
    Windows11 Home 64bit v:23H2 b:22631.3374
       #14

    Ok. You said it is a data drive. Testdisk also shows a MS Data partition. There is no doubt about it. Do not mistake the Volume Boot Record with system boot. When you create a volume, a partition table which defines the start and end sectors of the volume is written - in your case in Sector 2. When you format the drive usually as NTFS, the file system is written - in simple words a Volume boot record also called as Partition Boot record is written into the first sector of the partition. When you want to access the partition, the OS reads the start sector from the partition table and jumps to it. If it finds a valid Volume Boot record present in the start sector of the partition, your partition is accessed. If it does not find a valid boot record in the first sector of the partition, the partition is not accessible. You will not be able to boot into that partition.

    The screenshot which I posted in post #7, is my 5TB Seagate external drive. So it is a data drive. I deleted the original NTFS volume in it, created a new volume encompassing the whole drive and reformatted it as a GPT drive (NTFS). To be self contained I repeat the screenshot here.

    How to repair a damaged partition on a data drive?-16-01-2021-16-13-31.jpg

    The start sector is 32768 End Sector of the partition is 9767538687 ( as read from the above screenshot). The start sector should contain the Volume Boot record. Its backup will be in the end sector of the partition. Now I shall show the sectors. (After a short break. I need a walk and fresh air. .)
    Last edited by jumanji; 16 Jan 2021 at 12:45.
      My Computer


  5. Posts : 11,627
    Windows11 Home 64bit v:23H2 b:22631.3374
       #15

    Continuing
    Partition details
    How to repair a damaged partition on a data drive?-a16-01-2021-21-50-30.jpg
    Partition Tables in Sector 2
    How to repair a damaged partition on a data drive?-b16-01-2021-21-53-07.jpg
    Volume Boot record at Partition start sector 32768
    How to repair a damaged partition on a data drive?-c16-01-2021-21-56-35.jpg
    Backup of Volume Boot Sector at Partition end sector 9767538687
    How to repair a damaged partition on a data drive?-d16-01-2021-22-03-00.jpg

    Now in your case the fact that TestDisk does not show the [Boot] command but highlights [Type] indicates that it does not find anything NTFS and asks you to select the Partition Type.

    Now the questions:

    1. Do you know what was the file system? anything other than NTFS?

    2. Was it used in the same Startech Hotswap trayless rack the last time and it worked fine?

    3. What is the file system in the other bare drives?

    4. Have you checked whether those other bare drives work fine in the Startech rack?

    5. Do you have another PC to which you can internally connect this particular drive and other bare drives atleast one at a time?

    6. Do you have any bare external enclosure that can handle this 6TB drive?

    6. What is the model number of this WD drive and its actual specified capacity?

    You may also download and install MiniTool Partition Wizard free edition 9.1 ( only version 9.1)from Download MiniTool Partition Wizard Free Edition 9.1 for windows - Filepuma.com

    Post a screenshot of how this drive looks like in it.

    For comparison also put another bare drive in the Startech and post a screenshot

    Let me think and also do some experiments on my drive and check whether this problem can be resolved?
      My Computer


  6. Posts : 46
    Windows 10 Pro
    Thread Starter
       #16

    How to reapir a damaged partition on a data drive?


    It was formatted as NTFS; yes it was used in the same trayless rack last time it worked; any bare drives that I use as data drives are formatted as NTFS; yes other drives that I've inserted worked fine 2TB, 4TB, 6TB and 8TB all work fine; I have a second computer also with the same StarTech trayless rack and I've inserted it and it has the same problem on the other computer as well; I also have a USB3 hard drive dock and if I plug it in the drive still has the same problem; the model number of this drive is WD60EZRX-00MVLB1 and it's a 6TB drive; I have Minitool Partition Wizard Pro 12.3 the paid version, I haven't attempted to use any of the tools in it to attempt a recovery because I'm afraid to make it worse and if possible I'd like to recover the data.

    This is what the damaged drive looks like in Partition Wizard:
    How to repair a damaged partition on a data drive?-partitionwiz1.jpg

    I have an identical model hard drive that matches the damaged drive exactly i.e. WD60EZRX-00MVLB1 and this is what it looks like:
    How to repair a damaged partition on a data drive?-partitionwiz2.jpg

    Also FYI I use a utility called USB Safely Remove Safely Remove Hardware better alternative | USB Safely Remove to make sure the drive is safe to eject; I never pull a drive out unless it's been safely ejected
      My Computer


  7. Posts : 41,476
    windows 10 professional version 1607 build 14393.969 64 bit
       #17

    NormAtHome said:
    Also FYI I use a utility called USB Safely Remove Safely Remove Hardware better alternative | USB Safely Remove to make sure the drive is safe to eject; I never pull a drive out unless it's been safely ejected

    For external storage devices the default option use to be better performance.
    Since Windows 1809 it is quick removal:
    https://docs.microsoft.com/en-us/win...-storage-media
      My Computer


  8. Posts : 11,627
    Windows11 Home 64bit v:23H2 b:22631.3374
       #18

    NormAtHome said:
    ............I have Minitool Partition Wizard Pro 12.3 the paid version, I haven't attempted to use any of the tools in it to attempt a recovery because I'm afraid to make it worse and if possible I'd like to recover the data........
    . Glad to know that you have the paid version PW12.3 and also that you haven't tried data recovery on your own. Many users do that, muck up their drives further and then come here and it becomes well-nigh impossible to recover the data from such mucked-up drives.

    You have done most of the things that I would have asked you to do. I shall now take some more time to try and replicate your drive condition on my trial drive in an effort to find what exactly could have happened to turn your NTFS into (Other). If I can't find my way doing that, then I shall examine your drive with Bootice to see the sector contents of the partitions as in my post # 15. You may have to download bootice and take screenshots of the various sectors. I shall tell you how to do it when we come to it.

    The present condition of my Trial drive is good as shown in the following screenshot.

    How to repair a damaged partition on a data drive?-16-01-2021-16-21-48.jpg

    In the fifth screen on selecting the Data partition, [Boot] Command is available. When executed it shows the status of the boot sectors which here is Boot sector -Ok Backup boot sector - Ok.

    If Bootsector is Bad and backup bootsector is OK, we can give the command [Backup BS] which will copy the backup to the start sector and make it good.

    If Boot sector is OK but Backup bootsector is bad, we can give the command [ORG BS] which will copy the good start sector boot record to the end sector and make it good

    If both Boot sector and Backup boot sector are bad, we can give the command [Rebuild BS] which will read the partition table and rebuild the boot record in the start sector and end sector of the partition and make it good.

    If both Bootsector and backup Boot sector are OK and one is still unable to access the partition, it implies that the Master File Table is corrupt. Then [Repair MFT]. In almost all cases TestDisk would not repair the corrupt MFT and we recommend commercial software active @ file recovery and GetDataBack to recover the data.. These are all what we have done so far.

    In your case none of these commands are available in TestDisk and we may have to physically check the concerned sectors to know what has happened. But that if I am unable to replicate your disk condition on my Trial disk. I may take a day or two before I call you.
      My Computer


  9. Posts : 46
    Windows 10 Pro
    Thread Starter
       #19

    How to repair a damaged partition on a data drive?


    The only commands available on the fifth screen are [Type] [Image Creation] [Quit] boot is not available
      My Computer


  10. Posts : 11,627
    Windows11 Home 64bit v:23H2 b:22631.3374
       #20

    NormAtHome said:
    The only commands available on the fifth screen are [Type] [Image Creation] [Quit] boot is not available
    Yes, I know. Finally I managed to replicate your drive condition on my Trial drive..
    Screenshots:
    TestDisk:

    How to repair a damaged partition on a data drive?-17-01-2021-20-36-07.jpg

    Partition Wizard:

    How to repair a damaged partition on a data drive?-17-01-2021-20-31-32.jpg

    This was brought about by corrupting Sector 0, which is the Protective MBR. Corruption of first sector is a worrying factor. Did it happen just like that or is the first sector bad? Hope that it is the former.

    Now in Partition Wizard, rightclick on the Data partition and carry out a surface Test. Check the status of the first Block. Post a screenshot

    I have to carryout further testing on the trial drive on how to restore the first sector.
      My Computer


 

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