Hi,

It seems that I have to debug some sort of interesting problem around Avamar client 6.1.102 - 47 / Windows 2003 R2 X64 SP2.

On two Windows 2003 servers that have maybe experienced some kind of patition resize during their life we get a bunch backup errors...

The "system state" backup has been made really fine.

But when the data backup starts the Avamar client tries many time to create snapshops :

(...)

2015-10-21 02:19:08 avtar Info <6076>: VSS waiting one minute for snapshot resources to become available

2015-10-21 02:20:08 avtar Info <10967>: Found System Provider GUID. Will be using the System Provider GUID to perform backup

2015-10-21 02:20:08 avtar Info <8776>: Creating snapshot set...

2015-10-21 02:20:08 avtar Info <8780>: Creating the shadow (DoSnapshotSet) ...

2015-10-21 02:23:49 avtar Info <8688>: Status 2015-10-21 02:23:49, 0 bytes (0 bytes, 0.00% new) 61MB   0% CPU 

2015-10-21 02:38:49 avtar Info <8688>: Status 2015-10-21 02:38:49, 0 bytes (0 bytes, 0.00% new) 61MB   0% CPU 

2015-10-21 02:40:19 avtar Info <6076>: VSS waiting one minute for snapshot resources to become available

2015-10-21 02:41:19 avtar Info <10662>: Unable to create volume snapshot; backup proceeding with original (non-snapshot) volume content.  Some file content may not be backed up.

2015-10-21 02:41:19 avtar Info <7324>: Volume Type for "\" is "NTFS", Supports Compression=1, Encryption=1, ACLS=1, DataStreams=1, Reparse=1, Sparse=1

(...)

And then all the files that are under use by the system, classically can't being save by the Avamar client...

From here are the questions:

• Why the VSS option can't create the necessary snapshop in order to perform a VSS backup on this server ?
• Do we have some know issues that could explain this problem ?
• Does a previous partition resize on a server could cause the VSS snapshot process to fail ?

Thanks for your answers