You may observe one of the following symptoms when using vSphere ESXi/ESX 4.x/5.x:
/var/log/vmkernel
or /var/log/messages
log reports these VMFS Datastores as snapshot volumes. To resolve the problem with LVM Signature Mismatch, resignature or force-mount the Datastore.
The esxcfg-volume
and vicfg-volume
commands are used to resignature or force-mount a VMFS Datastore. For more information on usage, see the vSphere Command-Line Interface documentation and the vicfg-volume
reference.
For example:
vicfg-volume [connection_options] --list
vicfg-volume [connection_options] --resignature VMFSDatastoreUUID
vicfg-volume [connection_options] --persistent-mount
VMFSDatastoreUUID
This writes a new signature down to the LVM / VMFS Datastore. The volume may be brought back to a usable state. Paths to files on resignatured Datastores must be updated manually.
esxcfg-volume
or vicfg-volume
command fails, consider the reason: Failures may happen due to active I/O to the device, or because of another low-level problem.esxcfg-volume
or vicfg-volume
command.