Exchange 2010

I want to increase the vss size as per this article as my full backup fails on my exchange  servers(2010) which are in DAG
Error reading file \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1572\DB\xx.edb

11080 2cb0  11/19 06:36:33 1366218 [CsExchangeShadow::FullBackup] failed to backup file [\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy1572\DB\IhE.DB15.edb]
11080 2cb0  11/19 06:36:33 1366218 Abort shadow operation
11080 2cb0  11/19 06:36:33 1366218 CsSnapRequestor::DeleteSnapshot() - Call m_vss->DeleteSnapshots(m_snapshotSetId, type, bForceDelete, &lDeletedSnapshots, &NondeletedSnapshotID)  [FAILED, throwing CV exception] - Code = 0x80042308, Description = VSS_E_OBJECT_NOT_FOUND
11080 2cb0  11/19 06:36:33 1366218 CsSnapRequestor::DeleteSnapshot() - Error deleting f75100a4-40b2-4456-93bd-5537c3799a2b shadow set - VSS_E_OBJECT_NOT_FOUND



unable to delete snap shot

can anyone show me the path
pramod1Asked:
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RoninCommented:
Run
vssadmin list writers

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pramod1Author Commented:
they all look good with out errors
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pramod1Author Commented:
http://kb.commvault.com/article/WFS0010
 
 as per above article, I need to have 320mb of free space . I don't know where I need to check and increase the space on my exchange server. is it the page volume drive itself.my incremental backups are successful and full backups are failing
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RoninCommented:
On the same drive you're trying to perform backups.

In some cases you would have to switch the databases to circular logging in order to get rid of some logs that can be unreadable. The reason for me saying it, is because it seem that newer logs are OK, therefore the incremental backups are working. However, when you trying to perform full backup, all the logs for the database are inspected and if the system can't read it, backup fails.
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pramod1Author Commented:
do I really need 320 mb space free on vss volume, this is my question
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RoninCommented:
You need much more if you want your Exchange server to continue to function properly.
If the free disk space falls below the values, the Exchange will stop functioning correctly.
Understanding Back Pressure
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