The IBM® Tivoli® Storage Manager client detected that a virtual machine has assigned a disk that is in the VHD format or is in an unrecognisable or unsupported format. If the disk is in VHDX format it may be corrupted.
The IBM Tivoli Storage Manager found a virtual disk in VHD or unrecognisable format while preparing for a backup of a virtual machine.
If the virtual disk is in VHD format there are several options: Remove the VHD from the virtual machine, convert the virtual disk from VHD format to VHDX format, or adjust DOMAIN.VMFULL to skip the virtual machine from backup. If the disk is in VHDX format, check that the disk has not been corrupted.