Recover Vmfs 6 Datastore May 2026

vim-cmd hostsvc/datastore/attach <datastore_id> VMFS 6 stores a backup partition table and file system metadata in the first 1 MB and last 1 MB of the device. Even if the main partition table is lost, ESXi can often rediscover the volume using these backup structures.

esxcfg-volume -l This lists all detected VMFS volumes, including those marked as "snapshot" or "resigned" . If you see your volume with a (snapshot) or (resigned) tag, reattach it with: recover vmfs 6 datastore

To recover a datastore (e.g., after a partition table loss, accidental deletion, or metadata corruption), a critical piece is: Reattach the datastore via ESXi CLI without reformatting If the datastore is missing but the underlying LUN/disk still contains VMFS signatures: If you see your volume with a (snapshot)

esxcfg-scsidevs -m partedUtil getptbl /vmfs/devices/disks/naa.XXXXXX From there, you can manually using partedUtil setptbl and the saved VMFS partition layout. after a partition table loss

If the datastore does not appear in esxcfg-volume -l , the next step is scanning for VMFS headers:

esxcfg-volume -M <uuid_of_datastore> or force a mount if necessary: