Data Recovery Vmfs Partition -

Few things trigger a SysAdmin’s fight-or-flight response like logging into vSphere and seeing a datastore showing as "Not Mounted" or "Invalid Partition" . Your heart sinks. VMs are down. Backups? Let’s not talk about that right now.

First, find the disk size in sectors:

partedUtil get /vmfs/devices/disks/naa.6000c29... Let’s say the disk has 4294967296 sectors. The original VMFS partition likely started at sector 2048 and ended at the last sector minus 1. data recovery vmfs partition

vmfs6-recover /vmfs/devices/disks/naa.6000c29... This scans for stale VMFS signatures and can reattach the partition without data loss. If auto-recovery fails, you need to manually recreate the partition table exactly as it was. Backups

Clicking "New Datastore" writes a new VMFS header and partition table, which will overwrite the old one. Once that happens, recovery goes from "moderate" to "forensic excavation." Let’s say the disk has 4294967296 sectors

This guide walks you through the actual process of recovering a lost VMFS partition—no magic wands required. When ESXi cannot detect a VMFS datastore, it will often offer to "Create a new datastore" on the LUN or disk.

ls /vmfs/devices/disks/ Look for your device (e.g., naa.6000c29... ). Then check partition info: