IBM IC35L020 - Deskstar 20 GB Hard Drive Specifications page 166

Output parameters to the device
B
Sector Number
Cylinder High/Low
H
Input parameters from the device
Sector Number
Cylinder High/Low
H
Option bit for selection whether nonvolatile or volatile. B=0 is volatile condition.
When B=1, MAX Address which is set by Set Max Address command is
preserved by POR. When B=0, MAX Address which is set by Set Max Address
command will be lost by POR. B=1 is not valid when the device is in Address
Offset mode.
In LBA mode this register contains LBA bits 0–7 which is to be set. (L=1)
In CHS mode this register is ignored. (L=0)
In LBA mode this register contains LBA bits 8–15 (Low), 16–23 (High) which is to
be set. (L=1)
In CHS mode this register contains cylinder number which is to be set. (L=0)
In LBA mode this register contains LBA bits 24–27 which is to be set. (L=1)
In CHS mode this register is ignored. (L=0)
In LBA mode this register contains max LBA bits 0–7 which is set. (L=1)
In CHS mode this register contains max sector number. (L=0)
In LBA mode this register contains max LBA bits 8–15 (Low), 16–23 (High) which
is set. (L=1)
In CHS mode this register contains max cylinder number which is set. (L=0)
In LBA mode this register contains max LBA bits 24–27 which is set. (L=1)
In CHS mode this register contains max head number. (L=0)
Deskstar 60 GXP Hard disk drive specification
152