User manual
Hitachi hard disk drive specifications
160
11.21 Read Native Max Address (F8h)
Block Output Registers Command
Command Block Input Registers
Register
7
6
5
4
3
2
1
0
Register
7
6
5
4
3
2
1
0
Data
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Feature
-
-
-
-
-
-
-
-
Error
…See Below…
Sector Count
-
-
-
-
-
-
-
-
Sector Count
-
-
-
-
-
-
-
-
Sector Number
-
-
-
-
-
-
-
-
Sector Number
V
V
V
V
V
V
V
V
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder Low
V
V
V
V
V
V
V
V
Cylinder High
-
-
-
-
-
-
-
-
Cylinder High
V
V
V
V
V
V
V
V
Device/Head
1
L
1
D
-
-
-
-
Device/Head
-
-
-
-
H
H
H
H
Command
1
1
1
1
1
0
0
0
Status
…See Below…
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC
UNC
0
IDN
0
ABT
T0N
AMN
BSY
RDY
DF
DSC
DRQ
COR
IDX
ERR
0
0
0
0
0
V
0
0
0
V
0
-
-
0
-
V
Table 118 Read Native Max ADDRESS (F8h)
This command returns the native max LBA/CYL of HDD which is not affected by Set Max Address command.
The 48-bit native max address is greater than 268,435,455; the Read Native Max Address command shall return
a value of 268,435,455.
Input Parameters From The Device
Sector Number
In LBA mode, this register contains native max LBA bits 0-7. (L=1)
In CHS mode, this register contains native max sector number. (L=0)
Cylinder High/Low
In LBA mode, this register contains native max LBA bits 8-15 (Low), 16-23 (High).
(L=1)
In CHS mode, this register contains native max cylinder number. (L=0)
H
In LBA mode, this register contains native max LBA bits 24-27. (L=1)
In CHS mode, this register contains native max head number.(L=0)