Table 144 Set Max Unlock (F9H); Set Max Unlock (Feature = 03H) - Hitachi HDS723020BLA642 Specifications

11.39.3 Set Max Unlock (Feature = 03h)

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

Table 144 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 141
on the page 205 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.
7 6 5 4 3 2 1
- - - - - - -
0 0 0 0 0 0 1
- - - - - - -
- - - - - - -
- - - - - - -
- - - - - - -
1 - 1 D - - -
1 1 1 1 1 0 0
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Hitachi hard disk drive specifications
Command Block Input Registers
0 Register 7
- Data -
1 Error
- Sector Count -
- Sector Number -
- Cylinder Low -
- Cylinder High -
- Device/Head 1
1 Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
207
6 5 4 3 2 1 0
- - - - - - -
...See Below...
- - - - - - -
- - - - - - -
- - - - - - -
- - - - - - -
- 1 D - - - -
...See Below...
4 3 2 1
DSC DRQ COR IDX ERR
- - 0 -
0
V