Volume GUID Directory Entry

Offset Size Description Comments
0 (0x00) 1 EntryType 0xA0
1 (0x01) 1 SecondaryCount Must be 0x00
2 (0x02) 2 SetChecksum
4 (0x04) 2 GeneralPrimaryFlags*
6 (0x06) 16 VolumeGuid All values are valid except null GUID (00000000-0000-0000-0000-000000000000)
2 (0x16) 10 Reserved

* GeneralPrimaryFlags

Bits Size Description Comments
0 1 AllocationPossible Must be 0
1 1 NoFatChain Must be 0
2 14 CustomDefined

This is a benign primary directory entry and may not present in a file system.