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.