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Drive with DFS root low on free space - cannot find what is taking up the space

Posted on 2008-06-12
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Last Modified: 2012-06-21
The C: drive on a file server (has a DFS root on it), has low disk space.  I cannot see what is taking up the space, and I was wondering if the DFS root is reporting some kind of disk usage somehow.  Has anyone seen this?  It is a 148GB drive with only 1.4GB left.  When I run a "TreeSize" on it, only around 6.1GB comes back.  An error saying that it cannot reach the network share for the DFS root does happen, but when I look at the properties of the share, there is no disk space usage reported.

Thanks,
Jose
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Question by:inspiredit
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Expert Comment

by:Netman66
ID: 21778348
It almost sounds like you have Volume Shadow Services setup on that volume and it's comsuming most of your drive.

You can check to see what VSS is using like so:

vssadmin list shadows

Let us know.
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Author Comment

by:inspiredit
ID: 21779707
Here is the output of:  vssadmin list shadows.  I know that I don't have VSS set up on the C:\ volume, but what is "\\?\GLOBALROOT\...",  and where is that located?  And if that is what I think it is, how do I change it?
Thanks!
______________________________________________________________
Contents of shadow copy set ID: {b3f0a014-8bef-4cb7-848d-be1266e2daab}
   Contained 1 shadow copies at creation time: 6/12/2008 7:00:01 AM
      Shadow Copy ID: {e4c50816-5323-4531-b1ac-8de083884371}
         Original Volume: (E:)\\?\Volume{02dcaa3b-38e9-4f42-bf42-a78a6601d6cd}\
         Shadow Copy Volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy13
         Originating Machine: sv-trc-fs01.AllianceDefenseFund.org
         Service Machine: sv-trc-fs01.AllianceDefenseFund.org
         Provider: 'Microsoft Software Shadow Copy provider 1.0'
         Type: ClientAccessible
         Attributes: Persistent, Client-accessible, No auto release, No writers,
 Differential

Contents of shadow copy set ID: {ab26707a-a400-40f4-bc38-9029fa2e7dcf}
   Contained 1 shadow copies at creation time: 6/12/2008 12:00:01 PM
      Shadow Copy ID: {29654543-f803-4fcb-b9ca-75db531496ef}
         Original Volume: (E:)\\?\Volume{02dcaa3b-38e9-4f42-bf42-a78a6601d6cd}\
         Shadow Copy Volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy14
         Originating Machine: sv-trc-fs01.AllianceDefenseFund.org
         Service Machine: sv-trc-fs01.AllianceDefenseFund.org
         Provider: 'Microsoft Software Shadow Copy provider 1.0'
         Type: ClientAccessible
         Attributes: Persistent, Client-accessible, No auto release, No writers,
 Differential

Contents of shadow copy set ID: {ba1e62d3-2487-4a9f-b80f-4bf18580bb2d}
   Contained 1 shadow copies at creation time: 6/13/2008 7:00:01 AM
      Shadow Copy ID: {237c78f7-3e4a-4547-a093-3f799f21ecb7}
         Original Volume: (E:)\\?\Volume{02dcaa3b-38e9-4f42-bf42-a78a6601d6cd}\
         Shadow Copy Volume: \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy15
         Originating Machine: sv-trc-fs01.AllianceDefenseFund.org
         Service Machine: sv-trc-fs01.AllianceDefenseFund.org
         Provider: 'Microsoft Software Shadow Copy provider 1.0'
         Type: ClientAccessible
         Attributes: Persistent, Client-accessible, No auto release, No writers,
 Differential

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Expert Comment

by:Netman66
ID: 21780947
OK, let's see how much space it's using:

vssadmin list shadowstorage

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Author Comment

by:inspiredit
ID: 21781351
The Shadow Copy Storage volume, is on the E: drive...

Used: 3.895 GB
Allocated:  4.143 GB
Max: 488.281GB
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Expert Comment

by:Netman66
ID: 21781931
Ok, so it's not on the C drive.

Sometimes Malware can misreport drive space.  You may want to see if you're somehow infected with something.

Can you also check what free space there is from a CMD prompt?
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Accepted Solution

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inspiredit earned 0 total points
ID: 21823476
So this turned out to be a Symantec BackupExec issue.  The AOFO was stuck, and needed a reboot of the server.  The cached file went away after that.  No solution here, but thanks for your time.

Jose
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