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DPM2012 tape library issue RRS feed

  • Question

  • Hi,

    We have the following setup and need to achieve Long term backup to tape.

    1. Configured virtual tape library for DPM 2012.

    2. Done rescan/inventory on the DPM console and we are able view the details of Tape library (Drive type-LTO_Ultrium).

    - Library : Sun/Storage Tek Library

      + Drives (In use:0 | Idle:8)

      + Slots (Tape available:20 | Empty:20)

    3. While configuring the protection group long term on tape. The option "I want longterm protection using tape" is available and the option is checked. Next step going for retention range but next step its not giving the option for selecting tape drive its taking to Allocate storage (disks).

    Please suggest.....

    Thanks

    Sunny

    Thursday, May 9, 2013 1:47 PM

Answers

  • Hi,

    Q1. Is it possible to take backup only on tape drive rather than disk if we have selected the following parameters.

    Select protection group type : clients

    A1.  It is not possible to perform short term D2T for client protection because the clients initiate the backups, not the DPM Server. Only D2D2T is supported for client protection.

    Q2.  we have selected following parameters and suppose if the disk is full will the backup continue writing to the tape.

    Select protection group type : clients

    Select data protecting method : Short term protection using Disk

                                                         Long term protection using Tape

    A2.  If the primary goal is to maintain client backup on tape, then when you create the client protection group, select short term disk and only 1 day retention period, then select long term tape.   That will minimize disk storage required for short term disk protection.  DPM always mounts the last disk based backup and copies that to tape.  If a new disk based backup cannot be made between tape backups, then the tape backup will fail because DPM will not make a new tape backup containing duplicate data.  You will need to fix the disk based backup problem first.

    Q3. During backup is the data written first to disk and then to Tape or first to tape and then to disk in case both Disk and Tape selected as a part of protecting method.

    A3. Answered in Q2 - we always make disk backup first, then make tape backup from disk.

    Q4. How can we achieve taking backup only for tape and not to disk. Is it by selecting the below options

    Select protection group type : Servers

    Select data protecting method : Short term protection using Tape

                                                          Long term protection using Tape

    A4.  For non-client workloads, yes.

    Thanks


    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 sunny2710 Tuesday, May 14, 2013 4:41 AM
    Monday, May 13, 2013 3:19 PM
    Moderator

All replies

  • Hi,

     If you select short term "disk" - that will ask for disk allocation. You either need to uncheck the short term protection method, or change that from disk to tape.


    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.

    Thursday, May 9, 2013 3:21 PM
    Moderator
  • Hi Mike,

    We have unchecked the option for short term and we are using only log term protection.

    Even If we select short term only disk option is coming. we cant change it to disk to tape.

    Let me know if any settings need to checked and also confirm me that whether this particular Tape library (Drive type-LTO_Ultrium) supports for DPM 2012.

    Tape drive details:

    Library: Sun/StorageTek Library

    Details: IBM ULTRIUM ||| TAPE DRIVE

    Drive type: LTO_Ultrium

    Referred: http://technet.microsoft.com/en-us/library/hh916523.aspx

    Thanks

    Sunny


    • Edited by sunny2710 Friday, May 10, 2013 7:34 AM Tape drive details
    Friday, May 10, 2013 4:31 AM
  • Hi

    Can you please send me the output of the following DPM power shell command.

    Get-DPMLibrary -DPMServerName (&HOSTNAME) | select-object *

    If the tape library is showing as "unknown" in Windows device manager under medium changers, then you will need to call us for the proper drivers.

    Tape Library Models Supported by DPM.
     ----------------------------- 
     Sun/StorageTek L20
     Sun/StorageTek L40
     Sun/StorageTek L80
     Sun/StorageTek L180
     Sun/StorageTek L700
     Sun/StorageTek SL500
     Sun/StorageTek SL3000
     Sun/StorageTek SunVTL 

    Unfortunately licensing restriction prevent us from distributing the drivers freely - if you open a support case with us we can provide the drivers to you.  I know that is not most desirable way of getting drivers, but those were the terms we need to adhere to.  When you talk to an MS DPM Support engineer reference ID SOX090409700051 or ID  2329095.


    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.

    Friday, May 10, 2013 3:24 PM
    Moderator
  • Hi Mike,

    Thanks for the suggestions. Luckly after doing a rescan and inventory we are now able to get the tape option for backup.

    1. Is it possible to take backup only on tape drive rather than disk if we have selected the following parameters.

    Select protection group type : clients

    2.  we have selected following parameters and suppose if the disk is full will the backup continue writing to the tape.

    Select protection group type : clients

    Select data protecting method : Short term protection using Disk

                                                         Long term protection using Tape

    3. During backup is the data written first to disk and then to Tape or first to tape and then to disk in case both Disk and Tape selected as a part of protecting method.

    4. How can we achieve taking backup only for tape and not to disk. Is it by selecting the below options

    Select protection group type : Servers

    Select data protecting method : Short term protection using Tape

                                                          Long term protection using Tape

    Thanks

    Sunny



    • Edited by sunny2710 Monday, May 13, 2013 12:30 PM eidted
    Monday, May 13, 2013 9:07 AM
  • Hi,

    Q1. Is it possible to take backup only on tape drive rather than disk if we have selected the following parameters.

    Select protection group type : clients

    A1.  It is not possible to perform short term D2T for client protection because the clients initiate the backups, not the DPM Server. Only D2D2T is supported for client protection.

    Q2.  we have selected following parameters and suppose if the disk is full will the backup continue writing to the tape.

    Select protection group type : clients

    Select data protecting method : Short term protection using Disk

                                                         Long term protection using Tape

    A2.  If the primary goal is to maintain client backup on tape, then when you create the client protection group, select short term disk and only 1 day retention period, then select long term tape.   That will minimize disk storage required for short term disk protection.  DPM always mounts the last disk based backup and copies that to tape.  If a new disk based backup cannot be made between tape backups, then the tape backup will fail because DPM will not make a new tape backup containing duplicate data.  You will need to fix the disk based backup problem first.

    Q3. During backup is the data written first to disk and then to Tape or first to tape and then to disk in case both Disk and Tape selected as a part of protecting method.

    A3. Answered in Q2 - we always make disk backup first, then make tape backup from disk.

    Q4. How can we achieve taking backup only for tape and not to disk. Is it by selecting the below options

    Select protection group type : Servers

    Select data protecting method : Short term protection using Tape

                                                          Long term protection using Tape

    A4.  For non-client workloads, yes.

    Thanks


    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 sunny2710 Tuesday, May 14, 2013 4:41 AM
    Monday, May 13, 2013 3:19 PM
    Moderator
  • Hi,

    Thanks a lot Mike for answering all my queries.

    I have one more query :

    What is persistent binding for the tape drives and how do we configure it. Do we have any Microsoft article to do this.

    Operating system : Server 2008 R2 SP1

    Product : DPM 2012

    Thanks

    Sunny


    • Edited by sunny2710 Tuesday, May 14, 2013 4:50 AM edited
    Tuesday, May 14, 2013 4:46 AM
  • Hi,

    You usually don't need to do this with Windows server 2008 as the default for the tape is already 1, but you can double-check to be sure.

    HKLM\System\CurrentControlSet\Control\Tape
    Persistence:Reg_Dword:0x1


    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.

    Tuesday, May 14, 2013 3:06 PM
    Moderator