Maintain updated image-level backups (e.g., Veeam, Commvault) so that a corrupted partition can be restored rather than repaired.
It was 2:00 AM on a Tuesday when Jenna’s phone buzzed with the dreaded alert:
If you recently performed a storage migration or snapshot, ESXi might see the partition as a duplicate. Use: esxcli storage vmfs snapshot list If the partition appears here, it is not "corrupted" but rather "suppressed" to prevent UUID conflicts. Phase 2: Repairing VMFS Metadata vmware repair vmfs partition
Ensure the underlying RAID array or SAN LUN is "Optimal" in your hardware management console.
A gold standard for Windows-based recovery. It can bypass the ESXi OS entirely to read the raw VMFS structure and extract VMDK files. Maintain updated image-level backups (e
In cases of severe corruption, professional recovery tools may be required to scan the raw disk for VMFS headers and reconstruct the file hierarchy. Best Practices and Prevention
Within seconds, all 57 VMs reappeared in vCenter. Heartbeats went green. A few VMs needed a reset, but no data loss. Payroll was safe. Phase 2: Repairing VMFS Metadata Ensure the underlying
"My ESXi host suffered a power outage and my VMFS6 volume went offline. vmkfstools was throwing errors I couldn't resolve. This utility walked me through the repair process step-by-step. It found the original partition offset and restored access to the drive instantly. Highly recommended for any sysadmin dealing with a corrupted VMFS header."