Vmdk Corrupted -

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.

# Disk DescriptorFile version=1 CID=fffffffe parentCID=fffffffe createType="vmfs" RW 419430400 VMFS "server01-flat.vmdk" vmdk corrupted

"Server is slow. Throwing I/O errors. Tried to restart; now it won't boot." The CID (Content ID) was reset to fffffffe