In the vSphere Client, perform a Rescan Storage operation on your ESXi hosts.
A VMFS volume typically becomes inaccessible due to a few specific scenarios. The volume might be unmounted, or the partition table could be corrupted. In other cases, a storage snapshot might be viewed as a "snapshot LUN" by ESXi, requiring a resignation. Identifying the root cause—be it human error, a failed RAID controller, or an interrupted firmware update—is the first step in the recovery process. Phase 1: Initial Health Check
It was a typical Friday evening for John, a system administrator at a large enterprise. He had just finished a long week of work and was about to head home when he received a frantic call from his colleague, Sarah. She told him that one of the critical ESXi hosts in their datacenter had crashed, and with it, a crucial VMFS volume that stored several important virtual machines. recover vmfs volume
In the aftermath, John and his team analyzed the root cause of the issue. They discovered that a combination of a firmware bug and a power outage had caused the ESXi host to crash, leading to the VMFS volume corruption.
If the partition table was lost or overwritten: In the vSphere Client, perform a Rescan Storage
If the datastore contains , stop all DIY attempts and open a Severity 1 ticket with VMware GSS . They have internal tools ( vmfs-tools , voma ) that can repair certain corruption patterns that commercial tools cannot.
Ensure all HBAs and cables are secure.
John quickly sprang into action, rushing to the datacenter to assess the situation. Upon arrival, he found that the ESXi host had indeed crashed, and the prod-vms VMFS volume was no longer accessible. The error messages on the screen indicated a corrupted VMFS signature, which meant that the volume was no longer recognizable by the ESXi host.
After a tense few minutes, the RDMp tool completed the recovery process, and John was able to see the prod-vms volume reappear on the ESXi host. He quickly mounted the volume and verified that all the critical VMs were intact and accessible. In other cases, a storage snapshot might be