Vmware Repair Vmfs Partition //top\\ [TRUSTED — 2025]

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

partedUtil set /vmfs/devices/disks/naa.60012345 1 6 2048 25165823 Then, the moment of truth:

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. vmware repair vmfs partition

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

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

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.

partedUtil get /vmfs/devices/disks/naa.60012345 The output showed one partition with type “Unknown.” But the start and end sectors were still there. Payroll was safe

It was 2:00 AM on a Tuesday when Jenna’s phone buzzed with the dreaded alert: