Backup to disk takes too long

Discussion in 'Windows Small Business Server' started by Tim Anderson, Jun 27, 2005.

  1. Tim Anderson

    Tim Anderson Guest

    Strange problem.

    The immediate issue is that backup (SBS 2003) is taking too long. For
    example, backup from internal SCSI drive to internal IDE drive is taking 11
    hours. It breaks down like this:

    Backup of 32GB on main drive: 3 hours 47 mins
    Backup of 11.5GB Information Store 1 hour 26 mins
    Verify 32GB 4 hours 37 mins
    Verify information store 1 hour 41 mins

    the additional time is system state and the small boot partition.

    This seems far too long to me. Another strange feature is that during the
    backup CPU is often at or near 100%. I've analysed this with pstat. An entry
    that looks odd to me is this one, under a System process:

    78 17 786730 8081726A 0:00:00.000 0:18:43.093 Wait:VirtualMemory

    This is by far the highest figure in this column. Uptime on the system at
    the time pstat was run was 18 hours. I wonder if this is a clue to the
    extended backup times?

    System is 2.0 Ghz P4 with 1.75 GB RAM.

    Ideas most welcome. So far the only thing I've tried is adjusting the VM
    settings; it hasn't made any difference.

    Tim Anderson, Jun 27, 2005
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  2. Tim Anderson

    James B Guest

    Yes that is way to long unless you have some major drive, drive cable or
    interface problems. What about virus protection? If you have it, sure hope
    you do, what happens if it's turned off during a backup?

    Is there anything that might be running at the same time as the backup:

    1. Nightly virus scan
    2. Nightly spyware scan
    3. Remote data access?
    James B, Jun 27, 2005
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  3. Tim Anderson

    Tim Anderson Guest

    It's turned off.
    No. But as I mentioned, there are some clues, in particular the 100% CPU
    usage. I've tried to analyse this and noticed the strange wait:VirtualMemory

    Tim Anderson, Jun 27, 2005
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