5 Partition Recovery | Vmfs

sudo apt-get install vmfs-tools # Debian/Ubuntu vmfs-fuse /dev/sdX1 /mnt/recover -o ro,allow_other If files appear, copy them off immediately. No writing back. If the datastore UUID conflicts or header is damaged but VMs are still on-disk:

If voma and vmfs-fuse fail → go straight to Klennet or UFS Explorer. They understand VMFS 5 B+tree structure and can rebuild without a valid header. Situation: ESXi 6.5, 4 TB LUN, accidentally formatted as VMFS 6 by another host. User aborted after 3 seconds. vmfs 5 partition recovery

Scope: Accidental deletion, corrupted partition table, or "raw" appearance of a VMFS 5 datastore. No backups of the datastore metadata. 1. Immediate Do’s & Don’ts | Do | Don’t | |----|-------| | Power off VMs on the affected LUN | Write any new data to the LUN | | Take a VM snapshot of critical VMs (if any are still visible) | Run vmkfstools repair commands blindly | | Use dd or esxcli storage core device to preserve LUN header | Reformat or create a new datastore | | Work on a clone of the LUN if possible | Trust Windows CHKDSK or Linux fsck on the device | Key: VMFS 5 keeps metadata in the first ~8-10 MB of the partition (heartbeat region, file descriptors, FBMs). If that’s overwritten – recovery becomes hard but not impossible. 2. Check If It’s Really Gone SSH into an ESXi host with access to the LUN: They understand VMFS 5 B+tree structure and can