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Western Digital Hard Disk Drive OEM Specification
11.47
Set Max Address (F9h)
Com m and Block Output Registers
Com m and Block Input Registers
Register
7
6
5
4
3
2
1
0
Register
7
6
5
4
3
2
1
0
Data
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Feature
V
V
V
V
V
V
V
V
Error
…See Below …
Sector Count
-
-
-
-
-
-
-
B
Sector Count
-
-
-
-
-
-
-
-
Sector Number
V
V
V
V
V
V
V
V
Sector Number
V
V
V
V
V
V
V
V
Cylinder Low
V
V
V
V
V
V
V
V
Cylinder Low
V
V
V
V
V
V
V
V
Cylinder High
V
V
V
V
V
V
V
V
Cylinder High
V
V
V
V
V
V
V
V
Device/Head
1
L
1
D
H
H
H
H
Device/Head
-
-
-
-
H
H
H
H
Command
1
1
1
1
1
0
0
1
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 219 Set Max ADDRESS (F9h)
The device regards as Set Max Address command, if this command is immediately preceded by a Read Native Max
Address command. The device receives this command without a prior Read Native Max Address command, the
device regards as Set Max security extensions command according to feature register value. Valid features values
are as follows:
1.
01h indicates Set Max Set Password command
2.
02h indicates Set Max Lock command
3.
03h indicates Set Max Unlock command
4.
04h indicates Set Max Freeze LOCK command
This command overwrites the maximum number of Address of HDD in a range of actual device capacity. Once
device receives this command, all accesses beyond that Address are rejected with setting ABORT bit in status
register. Identify device command returns the Address which is set via this command as a default value.
Device returns command aborted for a second non-volatile Set Max Address command until next power on or
hardware reset.
Device returns command aborted during Set Max Locked mode or Set Max Frozen mode.
After a successful command completion, Identify Device response words (61:60) shall reflect the maximum address
set with this command.
If the 48-bit Address feature set is supported, the value placed in Identify Device response words (103:100) shall be
the same as the value placed in words (61:60). However, if the device contains greater than 268,435,455 sectors,
the capacity addressable with 28-bit commands, and the address requested is 268,435,455, the max address shall
be changed to the native maximum address, the value placed in words (61:60) shall be 268,435,455 and the value
placed in words (103:100) shall be the native maximum address.
If a host protected area has been established by a Set Max Address Ext command, the device shall return command
aborted.