IBM DTLA-307075 Hard Drive Specifications - Page 154

Security Disable Password F6h

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12.20 Security Disable Password (F6h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 1 0 1 1 0 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 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 V - 0 -V Figure 106. 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 Description Control Word bit 0 : Identifier (1- Master, 0- User) bit 1-15 : Reserved Password (32 bytes ) Reserved Figure 107. Password Information for Security Disable Password command The device will compare the password sent from this host with that specified in the control word. Deskstar 40GV & 75GXP hard disk drive specifications 142

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12.20 Security Disable Password (F6h)
see below
Status
1 1 1 1 0 1 1 0
Command
- - - - - - - -
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
- - - - - - - -
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
–
V
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 106. 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.
Reserved
17-255
Password
(32 bytes )
01-16
Control Word
bit 0
: Identifier (1- Master, 0-
User)
bit 1-15
: Reserved
00
Description
Word
Figure 107. Password Information for Security Disable Password command
The device will compare the password sent from this host with that specified in the control word.
Deskstar 40GV & 75GXP hard disk drive specifications
142