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257
Western Digital Hard Disk Drive OEM Specification
11.47.4
Set Max Freeze Lock (Feature = 04h)
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
0
0
0
0
0
1
0
0
Error
…See Below …
Sector Count
-
-
-
-
-
-
-
-
Sector Count
-
-
-
-
-
-
-
-
Sector Number
-
-
-
-
-
-
-
-
Sector Number
-
-
-
-
-
-
-
-
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder High
-
-
-
-
-
-
-
-
Cylinder High
-
-
-
-
-
-
-
-
Device/Head
1
-
1
D
-
-
-
-
Device/Head
1
-
1
D
-
-
-
-
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 224 Set Max Freeze Lock (F9h)
The device regards as Set Max Address command, if this command is immediately preceded by a Read Native Max
Address command.
The Set Max Freeze Lock command sets the device to Set_Max_Frozen state. After command completion any
subsequent Set Max commands are rejected. Commands disabled by Set Max Freeze Lock are:
1.
Set Max Address
2.
Set Max Set PASSWORD
3.
Set Max Lock
4.
Set Max Unlock