Recover ((hot)) - Vmfs

# Reset heartbeat on a single host vmkfstools --repairheartbeat /vmfs/devices/disks/naa.xxx:1 If that fails, forcibly clear reservation and heartbeat:

vmfs2recover -d /dev/sdb -o 128 -b 1048576 --force VMFS uses heartbeat regions to manage cluster integrity. A stale heartbeat prevents mounting. vmfs recover

– bundled with vSphere CLI: