IBM IC35L020 Hard Drive Specifications - Page 169

Set Max Unlock Feature = 03h

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15.29.3 Set Max Unlock (Feature = 03h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature 0 0 0 0 0 0 1 1 Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 1 1 0 0 1 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 - - 0 -V Figure 115. 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 Figure 111 on page 151 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, then the device sets the Set Max Unlocked state and all Set Max commands are accepted. Deskstar 60 GXP Hard disk drive specification 155

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15.29.3 Set Max Unlock (Feature = 03h)
see below
Status
1 1 1 1 1 0 0 1
Command
1 - 1 D - - - -
Device/Head
1 - 1 D - - - -
Device/Head
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder High
- - - - - - - -
Cylinder Low
- - - - - - - -
Cylinder Low
- - - - - - - -
Sector Number
- - - - - - - -
Sector Number
- - - - - - - -
Sector Count
- - - - - - - -
Sector Count
see below
Error
0 0 0 0 0 0 1 1
Feature
- - - - - - - -
Data
- - - - - - - -
Data
7 6 5 4 3 2 1 0
Register
7 6 5 4 3 2 1 0
Register
Command Block Input
Registers
Command Block Output
Registers
V
–
0
–
–
0
V
0
0
0
V
0
0
0
0
0
ERR
IDX
COR
DRQ
DSC
DF
RDY
BSY
AMN
T0N
ABT
0
IDN
0
UNC
CRC
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Status Register
Error Register
Figure 115. 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 Figure 111 on page 151 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, then the device sets the Set Max Unlocked state and all Set Max
commands are accepted.
Deskstar
60 GXP Hard disk drive specification
155