Western Digital Ultrastar DC HC310 Specifications page 267

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 input.(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 (= 63). (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)
Western Digital Hard Disk Drive OEM Specification
253