| Min version | Vista | 8 Pre RTM |
|---|---|---|
| Max version | 8 Pre RTM | 10 TH2 |
| x86 offset offset:bitpos | Field Name | |
| 0x0000 | volatile unsigned long TotalBlocks | unsigned long TotalBlocks |
| 0x0000 | volatile int64_t Aggregate64 | int64_t Aggregate64 |
| 0x0004 | volatile unsigned long SubSegmentCounts | unsigned long SubSegmentCounts |