| VT_BSTR | ID | Read Write | Unique, automatically generated ID |
| VT_BOOL | Logical | Read Write | Whether this segment is within an extended partition. |
| VT_BOOL | CanCreateLogical | Read Write | Whether a logical partition can be created in this segment. |
| VT_BOOL | CanCreatePrimary | Read Write | Whether a primary partition can be created in this segment. |
| VT_BOOL | Allocated | Read Write | Whether this segment represents allocated space. |
| VT_UI8 | Size | Read Write | Size of the volume (bytes). |
| VT_UI8 | OffsetInVolume | Read Write | The offset (bytes) of this segment in the volume. |
| VT_UI8 | OffsetOnMedia | Read Write | The offset (bytes) of this segment on the physical media. |
| VT_UI8 | SectorCount | Read Write | The number of sectors on this segment. |
| VT_UI8 | UsedBytes | Read Write | Used space in volume (bytes). |
| VT_UINT | DiskNumber | Read Write | The number assigned to the disk this segment is on. |
| VT_UINT | SectorSize | Read Write | The size of the sectors on this segment. |
| VT_BSTR | VolumeID | Read Write | The ID of the volume this segment is part of. |
| VT_UINT | PartitionType | Read Write | Numeric identifier for the type of partition this segment is part of. |
| VT_BSTR | PartitionTypeLabel | Read Write | User-friendly description of the type of partition this segment is part of. |
| VT_BSTR | DeviceId | Read Write | Unique Id of the disk containing this segment. |