IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive Specifications page 153

Input parameters from the device
Sector Count
Sector Number
Cylinder High/Low
H
This indicates the number of requested sectors not transferred. This number is
zero unless an unrecoverable error occurs.
This indicates the sector number of the last transferred sector. (L = 0) In LBA
mode, this register contains the current LBA bits 0–7. (L = 1)
This indicates the cylinder number of the last transferred sector. (L = 0) In LBA
mode, this register contains the current LBA bits 8–15 (Low) and bits 16–23
(High). (L = 1)
This indicates the head number of the last transferred sector. (L = 0) In LBA
mode this register contains the current LBA bits 24–27. (L = 1)
Travelstar 60GH & 40GN hard disk drive specifications
140