Recover VM from SNAP
Say you have VM guest corrupt and you do not have a backup but do have snap on the storage side. I do realize you may be using the different storage manufacturer. Refer to guide of your storage. This example is based on EMC.
1. If do not know it already you need to find snap on your storage system server_iscsi server_2 -snap -l it will list all snaps you have. snap should have associated with LUN number. copy the snap you are looking for.
2. promote snap to all ESX hosts. The reason is to promote to all hosts is because if you have DRS in the cluster it might decide to add the lun to a different hosts.
if no DRS just promote to one host only. server_iscsi server_2 -snap -promote (snap name) -initiator (ESX initiator name)
3. Next you would need to change LVM.EnableResignature set to 1 in Advanced Settings of ESX hosts. in the VC select the ESX you have promoted the snap to. Configuration. Advanced Settings. LVM.
4. In Configuration, Storage Adapters select iSCSI Software Adapter and Rescan you should now see you lun presented with unique name