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DPM 2007 & Tape Library RRS feed

  • Question

  • Hi all,

    We are running DPM 2007 on a W2K3 Std server with an attached HP Storageworks 1/8 G2 Tape Autoloader. Which has one LTO 4 device and slots for 8 tapes.

     Recently we enabled VERIFY on the weekly backup jobs.

     We have 4 Protection Groups and when the backup jobs run, the Autoloader takes the tape from slot 8, puts it in the LTO drive and starts backing up the 1st protection group. Once the entire protection group is backed up, then the Verify jobs run.

     But... this is when the 1st Verify job just sits there and nothing happens.

     It appears, that the Verify job is looking to Verify that 1st tape that was in slot 8. But that tape is still in the LTO 4 drive. And, somehow, DPM/Autoloader is not smart enough to realise the tape needed is not in slot 8, but in the LTO drive.

     So... I have to cancel the Verify jobs, and all remaining backup jobs for the other 3 Protection groups, and once they're all cancelled, the Autoloader will take that 1st tape out of the LTO drive back in to slot 8.

     Now I can re-run the Verify jobs, as the tape is in slot 8. Once they are done, I have to do the same procedure for the other 3 protection groups.

     Anyone know a work-around to this?

    Friday, October 1, 2010 7:20 AM

Answers

  • Hi,

    Does the verify job become active, or is it waiting.

    Check the version of the hplto.sys driver and firmware on the drive - it sounds like DPM is either having trouble unloading the tape after the 1st backup completes, or after remounting it, the load is not completing so we can read it.

    What should happen is:

    1st PG backup job(s) becomes active.
    DPM Moves tape from Slot to a Drive.
    Backup is performed by writing to tape...
    Backup writes complete.
    DPM Unloads tape, then moves tape from drive back to slot.
    Backup job completes successfully.
    DPM Verify job becomes active
    DPM Moves tape from slot to a Drive.
    Verify tape is performed by rewinding the tape then reading last backup set(s) on the tape..
    Verify job reads complete.
    DPM Unloads tape, then moves tape from drive to slot.
    Verify job completes successfully.
    2nd PG backup begins.
    ...
    ..
    .

    Kick off a Manual backup to tape job and watch very closely if all of the above steps occur, or at what step it gets stuck. 


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Tuesday, October 5, 2010 6:03 PM
    Moderator