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Table 1 Application Aware Snapshot Manager Issues and solutions (continued)
Issue
Solution
(and active on the other node). The snapshot is taken
successfully. You can ignore this message.
An error occurs when an application-managed snapshot
If an application-managed snapshot is created while a NIC
is created during NIC failover on an application server.
failover is in progress on an application server, the
following error may display in the Windows event log:
App-Managed SS Failed: Could not get list
of volumes on server
Wait until the NIC failover has completed.
Application-managed snapshots should then resume
successfully.
Snapshots fail with the following error:
When taking application managed snapshots via the CMC
Cannot create a quiesced snapshot because
or the CLI on a volume that contains a large number of
the snapshot operation exceeded the time
virtual machines, some virtual machines may fail due a
limit for holding off I/O in the frozen
failure to quiesce. The culprit could either be the VMware
virtual machine.
tools synch driver or MS VSS. The failure is not reported
in the CMC as the CMC is not currently logging VM
quiesce failures. For more information, see the VMware
KB article:
http://kb.vmware.com/selfservice/microsites/search.do?
language=en_US&cmd=displayKC&externalId=1018194
After creating an application-managed snapshot on a
The process of creating an application-managed snapshot
VMware volume, the event log may include an error
on a VMware volume consist of the following steps:
message such as:
1. Snapshots of all virtual machine volumes on the VMware
Failed to create application managed
volume are created.
snapshot.
2. The application-managed snapshot is created.
or
3. The intermediate virtual machine snapshots (in step 1)
Failed to create snapshot for one or more
are deleted.
VMs.
If a virtual machine is busy when the virtual machine
snapshots are being created, the VMware API may time
out. The application-managed snapshot is still created, but
the intermediate virtual machine snapshots are not deleted.
The virtual machine snapshot manager will indicate that
the virtual machine snapshots were created, but will not
display an indication that they were deleted. To resolve
this issue, you must manually delete the intermediate virtual
machine snapshots.
If you have a failover cluster configuration using Windows This message can be ignored. The snapshot was take
Server 2012 servers and an application-managed snapshot successfully on the cluster server where the volume resides.
is taken on a volume, the following error message may
display in the Windows Application log on the cluster
server that does not own the volume:
Volume Shadow Copy Service error:
Unexpected error querying for the
IVssWriterCallback interface. hr =
0x80070005, Access is denied.
Application-managed snapshots do not work on SMB file
With Windows Server 2012, SQL Server is not quiesced
shares presented by a Windows Failover Cluster.
when an application-managed snapshot is taken on an
SMB file share that is presented by a Windows Failover
Cluster. The snapshot appears as if it is a managed
snapshot, but because SQL Server was not quiesced, it is
not a true managed snapshot.
It is possible for scheduled application-managed snapshots To resolve this issue, ensure that scheduled snapshots are
to fail if the application server is overloaded and unable
set to times where there is less activity on the application
to quiesce the application.
server.
RDM volumes and application-managed snapshot support. Creating application-managed snapshots of volumes that
are attached to VMware virtual machines (VM) as a Raw
14
Using the Application Aware Snapshot Manager
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