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11.21 Security Disable Password (F6h)
Command Block Output
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
Figure 119. Security Disable Password Command (F6h)
The Security Disable Password command disables the security mode feature (device lock function).
The Security Disable Password command requests a transfer of a single sector of data from the host
including information specified in the figure below. Then the device checks the transferred password. If the
User Password or Master Password matches the given password, the device disables the security mode
feature (device lock function). This command does not change the Master Password which may be
reactivated later by setting User Password. This command should be executed in device unlock mode.
Word
00
01-16
17-255
Figure 120. Password Information for Security Disable Password command
The device will compare the password sent from this host with that specified in the control word.
Identifier
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 0 1 1 0
4
3
2
1
IDN
0
ABT
T0N
0
0
V
0
Description
Control Word
bit 0
bit 1-15
Password
Reserved
Zero indicates that the device should check the supplied password against the
user password stored internally. One indicates that the device should check the
given password against the master password stored internally.
Deskstar 120GXP hard disk drive specifications
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0
7
6
AMN
BSY
RDY
DF
0
0
V
: Identifier (1- Master, 0- User)
: Reserved
(32 bytes )
142
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
5
4
3
2
1
DSC
DRQ
COR
IDX
0
V
–
0
–
0
ERR
V
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