# Disk DescriptorFile version=1 CID=fffffffe parentCID=ffffffff createType="vmfs" # Extent description RW 41943040 VMFS "YourVM-flat.vmdk"
The article targets an error message similar to:
Wait – this will actually copy data if not careful. So the safest method is to use vmkfstools 's (advanced). vmware kb 55798
This creates a dummy descriptor file. The actual command recommended in older KB 55798 workflows uses a more direct approach:
Proactive measures reduce the chance of encountering this error again: The actual command recommended in older KB 55798
Sometimes, even with the extent present, the manual descriptor recreation fails due to deeper corruption. Then consider:
While the article itself addresses a specific error related to STS (Security Token Service) certificate validation, its underlying principles apply to many certificate rotation or mismatch problems in vCenter Server 6.x and 7.x. Let's break down what KB 55798 covers and why it matters. is a VMware Knowledge Base article that originally
is a VMware Knowledge Base article that originally documented the error:
vmkfstools -c <size_in_bytes> -a lsilogic -d thin newdescriptor.vmdk