Are you using vmdks or RDMs.?
when the DB boots up,,you have any other option other than formatting the dives..? like online the disk.. I am trying to check if they are only going offline pr losing the partition information.
if you can Also share the vmkernel and vmware.log of the vm whan the vm boots up..
We had some severe cabling issues between our NAS and the switch. I cant conclusively put the blame there because the switch is smart enough to deactivate any port-channel members that are not working. That said, we only had 2 out of the 12 10Gb connections actually working. I would expect that to possibly cause a performance issue, but not corruption.
We have since fixed all of the port-channel issues and have our fingers crossed that we wont see the issue again.
To your questions:
The VM boots up just fine. It had 8 VMDK's attached and all but one of those came up properly. The VMDK that stored the actual DB files was seen by the Windows 2012R2 OS as being there, but it apparently had no NTFS or partition structure that it recognized. Brining the disk on-line didnt have any affect on the drive readability. The partition info was gone.