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Set Max Unlock (Feature = 03h)
Command Block Output Registers
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
0
0
0
0
0
0
1
1
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 225 Set Max Unlock (F9h)
The device regards as Set Max Address command, if this command is immediately preceded by a Read Native Max
Address command.
This command requests a transfer of a single sector of data from the host including the information specified in
Table 222 on the page 271 with the stored SET MAX password.
If the password compare fails then the device returns an abort error to the host and decrements the unlock attempt
counter. This counter is initially set to 5 and is decremented for each password mismatch. When this counter
reaches zero then all Set Max Unlock commands are rejected until a hard reset or a power off.
If the password compares matches, then the device set the Set_Max_Unlocked state and all Set Max commands
shall be accepted.
273
Western Digital Ultrastar DC HC310 SATA Product Manual