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5.40.3 Set Max Unlock (Feature = 03h)
Table 87: Set Max Unlock command (F9h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7
6
5
CRC UNC
0
0
0
0
If this command is immediately preceded by a Read Native Max Address command, the device regards it as Set
Max Address command
This command requests a transfer of a single sector of data from the host including the information specified in
Table 83: "Set Max Set Password command" on page 128 with the stored SET MAX password.
If the password compare fails, 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, all Set Max Unlock commands are rejected until a hard reset or a power off occurs.
If the password compare matches, the device sets the Set_Max_Unlocked state and all Set Max commands are
accepted.
7 6 5 4 3 2 1 0
- - - - - - - -
0 0 0 0 0 0 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 1 0 0 1
4
3
2
1
IDN
0
ABT T0N AMN
0
0
V
0
Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0
7
6
5
BSY RDY DF DSC DRQ
0
0
V
0
133
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
see below
Status Register
4
3
2
1
COR IDX
-
-
0
-
0
ERR
V
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