Backup Utility Does Not Run Scheduled Backups to Network Drive

Discussion in 'Windows Server' started by Alan Auerbach, Aug 30, 2009.

  1. Until recently, the Backup Utility ran scheduled backups to a mapped network
    drive without problems. Very recently (within about a week) that stopped. I
    am able to run manual backups to the same location, but the scheduled
    backups all yield the same report:

    Backup Status
    The operation was not performed because the specified media cannot be

    My logon for the computer is Administrator
    The scheduled task is setup to run under POOLTHING\Administrator (POOLTHING
    is the domain name)
    The comnmand line for the task is

    C:\WINDOWS\system32\ntbackup.exe backup "@C:\Documents and
    Settings\Administrator\Local Settings\Application Data\Microsoft\Windows
    NT\NTBackup\data\Weekly Full.bks" /n "ServerBackup.bkf created 8/29/2009 at
    9:35 AM" /d "Set created 8/29/2009 at 9:35 AM" /v:yes /r:no /rs:no /hc:eek:ff
    /m normal /j "Weekly Full" /l:s /f "P:\ServerBackup.bkf"

    I could only find two files under:

    C:\Documents and Settings\Administrator\Local Settings\Application
    Data\Microsoft\Windows NT\NTBackup\data\

    for yesterday when the last attempt was made:

    Weekly Full.bks
    Weekly Full

    Neither file is readable with Wordpad

    This is all the information I have other than that the mapped network drive
    (p:) is oeprating properly and the file ServerBackup.bkf can be fully
    accessed manually from the server.

    Thank you in advance,
    /s/ Alan Auerbach
    Alan Auerbach, Aug 30, 2009
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  2. Welcome back - it appears that you found a better newsgroup. I will add my
    comments in-line.

    *** I assume that P: is a mapped drive. Mapped drives are
    *** specific to each logon instance. When the Task Scheduler
    *** launches your backup job then drive P: won't exist, unless
    *** you map it before launching ntbackup.exe or unless you
    *** have an active foreground session under "Administrator"
    *** that mapped it. Use UNC coding to get around this issue.
    *** This is the list of files/folders that get backed up. You can
    *** read it with notepad.exe. Do not modify it!
    *** This is probably rubbish.
    *** yes - but only in the foreground session!
    Pegasus [MVP], Aug 30, 2009
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  3. Dear Pegasus,

    Thank you for getting back to me so quickly.

    Since the schedule is setup to run as POOLTHING\Administrator (same as the
    foreground session) I do not understand the difference. BTW, the behavior is
    the same even if I am monitoring the foreground at the time that the
    scheduled task is set to run.

    I know nothing about UNC coding. Can you help me with that? Is there
    something in the mapping that needs to be changed? BTW, this problem only
    exists on the server. Running a similar scheduled backup on WinXP Pro
    machines has no problems. (I recognize that there are significant
    differences between the operating systems.)

    /s/ Alan Auerbach
    Alan Auerbach, Aug 30, 2009
  4. Pegasus [MVP], Aug 30, 2009
  5. Dear Pegasus,

    Thank you so very much for the solution! I understood how to directly
    reference a network resource but never knew that it was called UNC. Your
    advice worked perfectly.

    I cannot understand why this worked for years and now it does not (probably
    due to a recent Microsoft update) but, no matter. I am delighted that it
    works and I am very grateful to you for your generous assistance.

    Thank you,
    /s/ Alan Auerbach
    Alan Auerbach, Aug 30, 2009
  6. Thanks for the feedback.
    Pegasus [MVP], Aug 31, 2009
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