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DPM 2012 - Tapes not filling up RRS feed

  • Question

  • Hi

    I've seen multiple discussions on this, but non have helped me any and I did not want to hijack anyone else's thread with my specific issue.

    I'm running DPM2012 with a Powervault Dell 124T LTO5.  I'm running a Protection Group which backs up our Exchange 2010 to tape.  Even though my total backup is only around 650 GB, it spans it to 3 tapes (or fails if there is no other tape).  However, if I run my PG that backs up my HyperV snapshots, it backs up 1.4 TB (approximately the uncompressed capacity of the tape).  Then it fails or spans over depending if there is a spare tape in the library or now.

    Both PGs are set up with the same characteristics, aside from the backup times so they don't clash.  Colocation is disabled due to some legal or corporate policy.

    I have followed the instructions in the article by Mike Jaquet (http://blogs.technet.com/b/dpm/archive/2012/05/14/things-you-can-do-to-help-data-protection-manager-utilize-your-tapes-full-capacity.aspx), but it's not done anything to improve my situation.

    I have even replaced the whole library on suspicion that it may have been a faulty tape drive.

    Any help would be greatly appreaciated.

    Thanks in advance.

    Con

    Wednesday, October 24, 2012 11:40 AM

All replies

  • Hi

    I've seen multiple discussions on this, but non have helped me any and I did not want to hijack anyone else's thread with my specific issue.

    I'm running DPM2012 with a Powervault Dell 124T LTO5.  I'm running a Protection Group which backs up our Exchange 2010 to tape.  Even though my total backup is only around 650 GB, it spans it to 3 tapes (or fails if there is no other tape).  However, if I run my PG that backs up my HyperV snapshots, it backs up 1.4 TB (approximately the uncompressed capacity of the tape).  Then it fails or spans over depending if there is a spare tape in the library or now.

    Both PGs are set up with the same characteristics, aside from the backup times so they don't clash.  Colocation is disabled due to some legal or corporate policy.

    I have followed the instructions in the article by Mike Jaquet (http://blogs.technet.com/b/dpm/archive/2012/05/14/things-you-can-do-to-help-data-protection-manager-utilize-your-tapes-full-capacity.aspx), but it's not done anything to improve my situation.

    I have even replaced the whole library on suspicion that it may have been a faulty tape drive.

    Any help would be greatly appreaciated.

    Thanks in advance.

    Con

    I have the same problem!!!

    Anyone help us?

    Regards!


    Jorge Barata - Microsoft MVP | http://www.jorgebarata.eti.br | Twitter: @jbarata

    Wednesday, June 12, 2013 1:16 PM
  • Can advise another link

    http://social.technet.microsoft.com/Forums/en-US/dpmtapebackuprecovery/thread/e718e8e6-c0d6-496e-9407-ea1ccf51bb98

    Maybe...

    Monday, June 17, 2013 4:50 AM
  • Mike Jacquet, if u read it.

    problem with DPM 2012

    Almost the same situation as here

    Tried to do all, but i have a little bit another situation.

    LTO3 tapes(400/800GB). Have very stable results:

    \\.\Tape2147483646>TapeConsole_1.0>writeforspanning

    Status: Writing onto tape...Failed !!!
    Error_ID reported: 1100
    Number of bytes written: 2097152
    Giving up
    Time taken: 7326571ms
    \\.\Tape2147483646>TapeConsole_1.0>gettapeposition

    Status: Getting Tape Position...Success
    ------------------------------------------------------------------
    Tape Position
    ------------------------------------------------------------------
    Absolute Position:
    Current tape partition: 0
    Current tape ,3643632
    Logical Position:
    Current tape partition: 0
    Current tape ,3643632

    \\.\Tape2147483646>TapeConsole_1.0>writeforspanning

    Status: Writing onto tape...Failed !!!
    Error_ID reported: 1100
    Number of bytes written: 6291456
    Giving up
    Time taken: 7327227ms
    \\.\Tape2147483646>TapeConsole_1.0>gettapeinfo

    Status: Getting Tape Information...Success
    ------------------------------------------------------------------
    Media Information
    ------------------------------------------------------------------
    Total number of bytes on the current tape partition: 97,3141533696
    Number of bytes between the current position and the end of the current tape partition: 0,1339031552
    Number of bytes per block: 65536
    Number of partitions on the tape: 1
    Write protect status: Not write protected

    \\.\Tape2147483646>TapeConsole_1.0>gettapeposition

    Status: Getting Tape Position...Success
    ------------------------------------------------------------------
    Tape Position
    ------------------------------------------------------------------
    Absolute Position:
    Current tape partition: 0
    Current tape ,3501996
    Logical Position:
    Current tape partition: 0
    Current tape ,3501996


    \\.\Tape2147483646>TapeConsole_1.0>writetillend

    Number of bytes written: 655360
    Retrying ...Failed !!!
    Error_ID reported: 1100
    Number of bytes written: 655360
    Retrying ...Failed !!!
    Error_ID reported: 1129
    Number of bytes written: 0
    Retrying ...Failed !!!
    Error_ID reported: 1129
    Number of bytes written: 0
    Retrying ...Failed !!!
    Error_ID reported: 1129
    Number of bytes written: 0
    Retrying ...Failed !!!
    Error_ID reported: 1129
    Number of bytes written: 0
    Retrying ...Failed !!!
    Error_ID reported: 1129
    Number of bytes written: 0
    Giving up
    Time taken: 7353638ms
    ------------------------------------------------------------------
    Tape Position
    ------------------------------------------------------------------
    Absolute Position:
    Current tape partition: 0
    Current tape ,4333210
    Logical Position:
    Current tape partition: 0
    Current tape ,4333210

    \\.\Tape2147483646>TapeConsole_1.0>gettapeinfo

    Status: Getting Tape Information...Success
    ------------------------------------------------------------------
    Media Information
    ------------------------------------------------------------------
    Total number of bytes on the current tape partition: 97,3141533696
    Number of bytes between the current position and the end of the current tape partition: 0,0
    Number of bytes per block: 65536
    Number of partitions on the tape: 1
    Write protect status: Not write protected

    Drive correct discover EOT. No I\O errors, but wereis my capacity?!

     Current tape ,4333210* Number of bytes per block: 65536 = approx. 280Gb!

    Where is at least 80Gb?!

    Pls help

    PS

    last FW on drive and library of course

    Monday, June 17, 2013 4:59 AM
  • Additional info:

    I have another same HP library, but its SAS, and mine is SCSI

    I made all the same tests and( on second drive, SAS):

    \\.\Tape2147483646>TapeConsole_1.0>gettapeposition

    Status: Getting Tape Position...Success
    ------------------------------------------------------------------
    Tape Position
    ------------------------------------------------------------------
    Absolute Position:
    Current tape partition: 0
    Current tape ,6212930
    Logical Position:
    Current tape partition: 0
    Current tape ,6212930

      Current tape ,6212930 * Number of bytes per block: 65536 = 407GB looks like correct volume...

    I'm frustrated now. Problem in where? SCSI cable - i have no possibility to change it, SCSI drive - same situation.

    Monday, June 17, 2013 10:17 AM