Force Mount a Datastore
There are a couple of scenarios where you may want to force mount a datastore. You may want to mount a snapshot of a datastore, or a replicated datastore. Or, you may have run into an issue where your datastore is no longer available to be used, and VMware recognizes it as a snapshot. You can do a variety of things from the console or an ssh terminal.
First, list your volume and grab the UUID or friendly datastore name. Either one will work in this case.
You can then use a few different commands depending on what you want to do.
Mount the volume as a non-persistent datastore without re-signature (will not be mounted after reboot):
esxcfg-volume -m "UUID or Friendly Name"
Mount the volume as a persistent datastore without re-signature (will be mounted after reboot):
esxcfg-volume -M "UUID or Friendly Name"
Re-signature the volume and immediately mount:
esxcfg-volume -r "UUID or Friendly Name"