IBM IC35L020 - Deskstar 20 GB Hard Drive Specifications page 194

R
Input parameters from the device
Sector Count
Sector Number
Cylinder High/Low
H
The retry bit. If set to 1, then retries are disabled. It is ignored, when write cache
is enabled. (Ignoring the retry bit is in violation of ATA-2.)
The number of requested sectors not transferred. This will be zero, unless an
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)
Deskstar 60 GXP Hard disk drive specification
180