Maya stared at the now-green dashboard. Somewhere in the datacenter, a disk blinked its steady heartbeat. She smiled. Another VMFS ghost story, beaten by knowing exactly where VMware hides its backup superblocks.
VMware now saw the storage, but as a fresh, unmounted volume. The partition table? Intact. The VMFS superblock? Unknown. recover vmfs datastore
Success: Found backup VMFS6 superblock at 0x20000000 . Maya stared at the now-green dashboard
Within 90 minutes, 34 of 37 VMs booted cleanly. Three had corrupted swap files—recreated them. The fraud detection system was back online at 4:15 AM, just before the London trading desk opened. Another VMFS ghost story, beaten by knowing exactly
Step 4: She used dd to copy that backup block over the primary superblock (after making a full LUN image with ddrescue to a separate 12-TB drive—insurance). # dd if=/dev/sde1 bs=1M skip=512 count=1 of=primary_superblock_backup.bin Then, using vimfstools (from a recovered ESXi maintenance mode session): # vmkfstools -B recover /vmfs/devices/disks/naa.6000...:1
The datastore reappeared in the vSphere Client. VMs showed as "unknown"—expected. She browsed the datastore: all VM folders, .vmdk , .vmx files intact.