Vmware Repair Vmfs — Partition

She was the senior virtualization engineer for a mid-sized financial firm. Fifty-seven virtual machines—including the exchange server, the CRM, and the entire payroll system—lived on a single 12 TB VMFS datastore. And now, that datastore had vanished from vCenter.

She pulled up a spare laptop and connected directly to the SAN’s management interface. The LUN was healthy. The partition was just... lost. Not overwritten. Just mislabeled.

Within seconds, all 57 VMs reappeared in vCenter. Heartbeats went green. A few VMs needed a reset, but no data loss. Payroll was safe. vmware repair vmfs partition

He just blinked. “I didn’t know you could repair a partition.”

esxcfg-volume -M /vmfs/devices/disks/naa.60012345:1 She held her breath. The console ticked. She was the senior virtualization engineer for a

Next, she used vmfs-fdisk —a hidden gem in ESXi’s recovery toolkit—to scan for VMFS signatures:

And that was the night she stopped trusting firmware updates and started documenting every single partedUtil and vmfs-fdisk command in a shared wiki—just in case the next poor soul got the same 2:00 AM alert. She pulled up a spare laptop and connected

The underlying hardware was fine. A routine firmware update on the SAN had crashed midway, corrupting the partition table on the LUN. The disks were still there, spinning away, but ESXi couldn’t see the VMFS signature anymore. To the hypervisor, the partition now looked like raw, unformatted space.