Vmdk Corrupted ((new)) -

I pull the manifest. The VMDK is 2TB thin-provisioned. The VM won't boot. The backup ran six hours ago, but the differential is useless because the block map is scrambled.

Upon attempting to power on the VM, vSphere returned the dreaded: "Failed to power on VM. The specified virtual disk needs repair (Corrupt disk)." Attempting to browse the datastore revealed the file server01_2.vmdk (the 200GB delta disk) present, but the system could not read its metadata. Part 1: The Post-Mortem Analysis What is a VMDK? A VMDK is not a single file, but a logical container. It consists of a small descriptor file (text) and a large extent file (raw data). Corruption often strikes the descriptor or the filesystem journal within the extent. vmdk corrupted

# Verify descriptor matches flat extent size DESCRIPTOR_SIZE=$(grep "RW" $vmdk | awk 'print $2') FLAT_SIZE=$(stat -c %s $vmdk%-flat.vmdk.vmdk 2>/dev/null) I pull the manifest

Scenario: VMware ESXi environment, version 7.0.3. VM: Legacy SQL Server. The backup ran six hours ago, but the

The CID (Content ID) was reset to fffffffe — a flag meaning "unknown or corrupted parent." The flat extent is intact, but the mapping is blind.

#!/bin/bash # vmdk_integrity_check.sh # Checks for early signs of VMDK corruption DATASTORE_PATH="/vmfs/volumes/VM_Storage" LOG_FILE="/var/log/vmdk_health.log"