If you are restoring from a storage array snapshot or presenting a LUN to a new host, you may encounter a signature mismatch. The ESXi host sees the VMFS volume but knows it doesn't belong to it (Snapshot ID mismatch).
Sometimes the datastore is fine, but a specific virtual disk is corrupted. repair vmfs datastore
Repairing a VMware Virtual Machine File System (VMFS) datastore is a high-stakes operation that demands a disciplined, diagnostic approach. Whether the issue is a missing volume after a reboot or deep metadata corruption, the primary rule is to like reformatting, which can permanently overwrite your data. 1. Initial Triage and Diagnostics If you are restoring from a storage array