I used to keep all my VSS snaps on a separate drive from the data and only
used that drive for VSS with no restrictions.  Ended up solving a lot of
those kind of problems.

Jon

On Fri, Aug 12, 2011 at 8:43 AM, Mike Leone <[email protected]> wrote:

> I've started getting errors from VSS on a Win2008 R2 server. We run
> Networker as our backup program, and it uses VSS to make snapshots, and
> then backs up from those snapshots (if I'm understanding that process
> correctly). And the last couple nights, it has been partially failing
> (partially meaning that some files weren't backed up, but most were).
>
> (I've never changed any settings for VSS, as Networker handles all that)
>
> First thing I see, in SYSTEM log of the client:
> (E: is the main data drive, and X: is the disk that Networker writes to(
>
> Event 33, source: volsnap:
> The oldest shadow copy of volume E: was deleted to keep disk space usage
> for shadow copies of volume E: below the user defined limit.
>
> Event 24, source: volsnap:
> There was insufficient disk space on volume X: to grow the shadow copy
> storage for shadow copies of E:.  As a result of this failure all shadow
> copies of volume E: are at risk of being deleted.
>
> Event 35, source volsnap:
> The shadow copies of volume E: were aborted because the shadow copy
> storage failed to grow.
>
> And then Networker reports that some files weren't backed up.
>
> E: size = 665G
> X: Free space = 609G
>
> So I guess what I need to do is for VSS to not use so much space for
> it's snapshots, so it doesn't run out of room.
>
> VSS Use limit of X: is 184,319M (which is 10% of the total size of
> 1800G). I *think* if I reduce this (to say, 125,000M) then the snapshots
> shouldn't take up all available space and cause my errors. Because it
> looks like VSS is using this drive to (temporarily) store it's
> snapshots, and Networker is also using this drive to store it's backups
> on).
>
> Thoughts/comments/advice?
>
> Thanks
>
>
>
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