IBM IC35L020 - Deskstar 20 GB Hard Drive Specifications page 123

Input parameters from the device
Sector Number
Cylinder High/Low
H
Error
In LBA mode this command formats a single logical track including the specified LBA.
In LBA mode this register specifies current LBA address bits 0–7. (L=1)
In LBA mode this register specifies current LBA address bits 8–15 (Low),
16–23 (High)
In LBA mode this register specifies current LBA address bits 24–27. (L=1)
The Error Register. An Abort error (ABT=1) will be returned when LBA is out of
range.
Deskstar 60 GXP Hard disk drive specification
109