Dell PowerVault NX3600 - Manual (Page 92)

Workaround
• If Java script is disabled, enable Java script. For
information about enabling Java script, see the
browser's help.
• If IE SEC is enabled, disable it.
Troubleshooting Backup Issues
Troubleshooting Snapshots
Description Taking and deleting snapshots fail.
Cause Probable causes may be:
• There are many client I/O requests waiting to be
serviced, including a request to remove a large
directory.
• There are many snapshot creation/deletion
requests being currently processed.
• Another snapshot request for the volume is
currently being executed.
• The total number of snapshots reached the
system limit.
• Wrong IP address was specified in the backup
job.
Workaround
• For a manual request failure, retry taking or
deleting the snapshot after a minute or two.
• If the request originated from the snapshot
scheduler, wait another cycle or two. If the failure
persists, try taking or deleting the snapshot
manually on the same volume.
• Check the dashboard if the system is under heavy
workload. If the system is under a heavy
workload, wait until the workload decreases and
reissue the snapshot request.
• Check the snapshot schedule. A very dense
snapshot schedule has a negative impact on the
overall performance of the system. The
accumulated snapshot rate must not exceed 20
snapshots per hour per system.
• Check the total number of snapshots in the
system. If the number is in thousands, delete a
few snapshots and retry.
• Ensure the Client virtual IP address is specified in
the backup job.
Troubleshooting An NDMP Internal Error
Description Backup or restore fails with an internal error.
Cause NDMP internal errors are indicators of a file system not
being accessible or a NAS volume not being available.
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