Min version	Vista SP1	8.1
Max version	8	10 TH2
x64 offset offset:bitpos	Field Name
0x0000	uint16_t BlockUnits
0x0002	uint8_t SizeIndex
0x0003:0x00	uint8_t UseAffinity	uint8_t UseAffinity
0x0003		volatile uint8_t Flags
0x0003:0x01	uint8_t DebugFlags