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Reinstall OS on DPM Server, Restored DB, DPM error "Disk failed or not fond" RRS feed

  • Question

  • I just installed Server 2012 on my DPM server.  All of the disks show up in disk management, with the 2 dpm disks showing Offline.  After installing DPM 2012 SP1, I stopped the dpm & sql services, copied the old database over top of the newly installed one, and ran dpmsync -sync.  

    Now when I open DPM, I see the protection groups, alerts, etc I expected, but the management tab shows errors on the disks "Disk Failed or Not Found".  

    I found a solution for this issue posted by Mike in a few other threads, such as this one:

    http://social.technet.microsoft.com/Forums/en-US/dpmstorage/thread/4562f85c-d826-4715-856a-999c5e0aa1b1

    You can use the below procedure to check and change the disk signature so DPM can recoginze the disk again.
    To resolve this type of issue please follow the steps below.
    1. Close the DPM administrator console and disk management console as well if open. 
    2. Launch SQL Server Management studio and expand the DPMDB and then tables.
    3. Find the SQL table named "tbl_SPM_Disk" and open it and locate the columns named "signature" and "NTDiskNumber" or run the following query:
    use dpmdb
    select ntdisknumber,signature,IsInStoragePool from tbl_SPM_Disk
    4. Make note of the value in the "signature" column; particularly the leading 8 Bytes as this is the disk signature. The "NTDiskNumber" can be leveraged so that you properly identify each disk properly as they're ordered in the system. You can also leverage the "TotalSize" column as a way to identify the missing disk(s) properly.
    
    5. If the disk is NOT GPT-based then you can simply use diskpart.exe to first list the disks (list disk) in the system then select the disk (select disk x) which belongs in the storage pool. Once the disk has been selected you can then write the correct signature to it using "Unique Disk ID=1a2b3c4d" replacing "1a2b3c4d" with the correct signature as found in the "tbl_SPM_Disk" SQL table.
    6. Next back in the "tbl_SPM_Disk" SQL table check the "IsInStoragePool" column to ensure that it is set to true (value of 1). If it is set to false (value of 0) then set it to true and then close SQL Server Management Studio then re-launch the DPM administrator console to verify that the storage pool disk is present again (you may have to rescan disks in the DPM admin console).

    Unfortnately, Both of my 2 dpm disks are GPT partitioned.  One is about 2.5TB, the other is 6TB.  So, I can't do step 5.  Even so, I have gone through 1-4.  I compared the disk ID from the database with the disk ID that diskpart shows for each disk, and they match.  I've also checked the "IsInStoragePool" field in the DB for each of the two disks, and both are set to 1.  

    What else can I do to get dpm to see these disks again?

    Saturday, January 12, 2013 12:25 AM

Answers

  • Hi,

    <snip>
    All of the disks show up in disk management, with the 2 dpm disks showing Offline.
    <snip<

    You need to bring the disks online in windows disk management before DPM can recognize them.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    • Marked as answer by NeighborGeek Saturday, January 12, 2013 9:29 PM
    Saturday, January 12, 2013 4:17 PM
    Moderator

All replies

  • Hi,

    <snip>
    All of the disks show up in disk management, with the 2 dpm disks showing Offline.
    <snip<

    You need to bring the disks online in windows disk management before DPM can recognize them.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    • Marked as answer by NeighborGeek Saturday, January 12, 2013 9:29 PM
    Saturday, January 12, 2013 4:17 PM
    Moderator
  • Thanks, I was thinking for some reason that they were supposed to show offline.  Maybe I was confusing the DPM disks with disks for a CSV.  
    Saturday, January 12, 2013 9:29 PM