Volume Snapshot Driver Integrity

  • Article

Applies To: Windows Server 2008 R2

Shadow Copies of Shared Folders uses the Volume Snapshot driver (Volsnap.sys) to create shadow copies in Windows. This driver uses storage space allocated on a volume to maintain a snapshot of the contents of the shared folders. This storage space is called the Diff Area.

Events

Event ID Source Message

4

VolSnap

 The shadow copy of volume %2 could not be created due to insufficient resources for worker threads.

5

VolSnap

 The shadow copy of volume %2 could not be created due to insufficient non-paged memory pool for a bitmap structure.

6

VolSnap

 The shadow copy of volume %2 could not create a new paged heap.  The system may be low on virtual memory.

8

VolSnap

 The flush and hold writes operation on volume %2 timed out while waiting for a release writes command.

9

VolSnap

 The flush and hold writes operation on volume %2 timed out while waiting for file system cleanup.

15

VolSnap

 The shadow copies of volume %2 were aborted because of insufficient paged heap.

21

VolSnap

 The flush and hold operation for volume %2 was aborted because of low available system memory.

Shadow Copies of Shared Folders

File Services