Never write to a suspected corrupt VMFS volume before attempting data recovery. First, work in read-only mode. Always have current backups. Disclaimer: This guide is for informational purposes. Always test procedures in a lab environment before performing on production systems.
When a VMFS volume becomes corrupted or inaccessible, . Acting methodically is crucial to avoid permanent data loss. repair vmfs volume
esxcli storage vmfs snapshot list Then, mount it manually: Never write to a suspected corrupt VMFS volume
esxcli storage vmfs extent list This shows all VMFS extents and their mount status. An unmounted volume will have no device listed or show "unmounted". Sometimes, automatic mounting fails but a manual mount works. Disclaimer: This guide is for informational purposes
First, identify the VMFS device UUID:
esxcli storage vmfs mount -l "datastore-name" -U "device-uuid" If mounting fails with a clear error (e.g., "File system is inconsistent" ), you need file system repair. Critical note: Never run repairs on an actively used VMFS volume. Put the ESXi host into maintenance mode or, ideally, boot into a recovery environment or use a Linux VM with direct LUN access.