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Storage Spaces Recovery after Partition Table failure?

    Question

  • Hello everyone.

    Following problem occured: I have at home a Storage Spaces setup with 4 Harddrives, 2x 2TB WD and 2x 3TB Drives. Yesterday I started copying an archive from one virtual harddrive to another. This worked perfectly fine and today the process finished.

    All of a sudden, a pop-up of windows appeared which said that there were problems with some harddrives, and windows must restart to resolve those problems. So I restarted the computer. After the reboot, two harddrives were shown missing in the pool (the 2x 3TB HDD's). After starting up disk-management I found both harddrives still connected to the computer, but now both with a capacity of only 746.52GB's each. When clicking on one of the drives, windows wants to re-initialize the drives, which i did not do so far.

    It seems that Windows *destroyed* the partition tables of both harddrives at the same time, which means that my data (which all was put on VHD's on parity-mode) is not accessible anymore.

    Do you guys have any idea of how to restore the drives? I have downloaded ReclaiMe Storage Spaces, but the license-costs of 299.-$ are insane. The drives did not contain any important data, some backups of my system and an archive with movies etc.
    At the moment, R-Studio is scanning one drive. As I know this is one of the only tools which is able to read ReFS-formatted drives.

    I am running Storage Spaces on Windows 8 64bit.

    For any suggestions I would be very thankfull!

    Friday, August 23, 2013 12:47 PM

Answers

  • Yes, it is the case that it was on virtual Raid 5 (called "parity").

    I know that I am not in the right forum for this matter, but in the windows 8 part of the forums no *specialists* will read this thread, and because storage spaces is the same for all versions of Windows 8 (including Windows Server), I thought that my success rate would be higher here.

    I'm aware that it is not possible to recover data from a raid 5 in single parity mode if more than 1 drive fails at the same time. I'm also aware that a raid 5 is still not save and that you still have to do a backup.

    I now have deleted all data from the drives and started a new storage pool, and i found the cause of the problem:
    As it seems the Intel RST driver (Rapid Storage Technology) mishandled my 3TB drives. There have been adressing problems due to an old version of the driver, causing the operating system to see the drives as 2.2TB drives instead of 3TB, and the leftover 746GB on both drives were deleted from the partitioning table which I was not able to restore (but still able to see under windows). I recommend that all people who have storage pools running to update to the latest version of the driver. Be sure to have saved your data before installing, I do not know how the new driver affects running Storage Pools. More about the adressing problem can be found here: PC-World Article

    The newest driver can be downloaded here: Intel RST Driver

    I hope nobody with important data has the same problems as I had. Luckily for me the data can be retrieved.

    Thanks for your help. If anyone has the same problem, do not hesitate to ask for help!


    Monday, August 26, 2013 9:21 AM

All replies

  • Hi,

    Unless it is a 3/4 way mirror disk, I'm afraid we will not able to get data back on virtual disk as more than 1 hard disk corrupted. This is similar to RAID.


    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tnmff@microsoft.com.

    Sunday, August 25, 2013 10:02 AM
    Moderator
  • I noticed that it is a Windows 8 system so generally we will recommend posting to Windows 8 forum. However for the specific case you may not get a properly solution in Windows 8 forum either as it is a data lose issue.

    Sorry for the result.


    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tnmff@microsoft.com.

    Monday, August 26, 2013 8:42 AM
    Moderator
  • Yes, it is the case that it was on virtual Raid 5 (called "parity").

    I know that I am not in the right forum for this matter, but in the windows 8 part of the forums no *specialists* will read this thread, and because storage spaces is the same for all versions of Windows 8 (including Windows Server), I thought that my success rate would be higher here.

    I'm aware that it is not possible to recover data from a raid 5 in single parity mode if more than 1 drive fails at the same time. I'm also aware that a raid 5 is still not save and that you still have to do a backup.

    I now have deleted all data from the drives and started a new storage pool, and i found the cause of the problem:
    As it seems the Intel RST driver (Rapid Storage Technology) mishandled my 3TB drives. There have been adressing problems due to an old version of the driver, causing the operating system to see the drives as 2.2TB drives instead of 3TB, and the leftover 746GB on both drives were deleted from the partitioning table which I was not able to restore (but still able to see under windows). I recommend that all people who have storage pools running to update to the latest version of the driver. Be sure to have saved your data before installing, I do not know how the new driver affects running Storage Pools. More about the adressing problem can be found here: PC-World Article

    The newest driver can be downloaded here: Intel RST Driver

    I hope nobody with important data has the same problems as I had. Luckily for me the data can be retrieved.

    Thanks for your help. If anyone has the same problem, do not hesitate to ask for help!


    Monday, August 26, 2013 9:21 AM