Hitachi HDS723020BLA642 Specifications page 246

Output Parameters To The Device
Sector Count
Sector Number
Cylinder High/Low
H
Input Parameters From The Device
Sector Count
Sector Number
Cylinder High/Low
H
The number of continuous sectors to be transferred. If zero is specified, then 256
sectors will be transferred.
The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 0 - 7. (L=1)
The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)
The head number of the first sector to be transferred. (L=0)
In LBA mode, this register contains LBA bits 24 - 27. (L=1)
The number of requested sectors not transferred.
unrecoverable error occurs.
The sector number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 0 - 7. (L=1)
The cylinder number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 8 - 15 (Low), 16 - 23 (High). (L=1)
The head number of the last transferred sector. (L=0)
In LBA mode, this register contains current LBA bits 24 - 27. (L=1)
Hitachi hard disk drive specifications
246
This will be zero, unless an