Hitachi C4K60 Specifications - Page 91

Recalibrate [1Xh], 5.28. Security Disable Password [F6h]

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7.5.27. Recalibrate [1Xh] Task File Registers Command LBA High LBA Mid LBA Low Device/Head Sector Count Features 7 6 5 4 3 2 1 0 1Xh XX XX XX X X X DRV X X X X XX XX The RECALIBRATE command performs no operation. Upon receipt of the command, the device clears BSY and generates an interrupt. 7.5.28. Security Disable Password [F6h] Task File Registers Command LBA High LBA Mid LBA Low Device/Head Sector Count Features 7 6 5 4 3 2 1 0 F6h XX XX XX X X X DRV X X X X XX XX The SECURITY DISABLE PASSWORD command requests a transfer of a single sector of data from the host. The following table defines the content of this sector of information. Then the device checks the transferred password. If the User password or the Master password match, the device disables the lock function. This command does not change the Master password that may be reactivated later by setting a User password. Table 7.20 Password Data Format Word Contents 0 Control Word bit 15-1 Reserved bit 0 Identifier 0 = Compare user password, 1 = Compare master password 1-16 Password (32bytes) 17-255 Reserved Device returns aborted command error if the device is in Locked mode, or the device is in Frozen mode. K6610170 Rev.2 Dec 22, 2004 - 91 -

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K6610170
Rev.2
Dec 22, 2004
- 91 -
7.5.27. Recalibrate [1Xh]
Task File Registers
7
6
5
4
3
2
1
0
Command
1Xh
LBA High
XX
LBA Mid
XX
LBA Low
XX
Device/Head
X
X
X
DRV
X
X
X
X
Sector Count
XX
Features
XX
The RECALIBRATE command performs no operation.
Upon receipt of the command, the device clears BSY and generates an interrupt.
7.5.28. Security Disable Password [F6h]
Task File Registers
7
6
5
4
3
2
1
0
Command
F6h
LBA High
XX
LBA Mid
XX
LBA Low
XX
Device/Head
X
X
X
DRV
X
X
X
X
Sector Count
XX
Features
XX
The SECURITY DISABLE PASSWORD command requests a transfer of a single sector of data from the
host. The following table defines the content of this sector of information. Then the device checks the
transferred password. If the User password or the Master password match, the device disables the lock
function. This command does not change the Master password that may be reactivated later by setting a
User password.
Table 7.20 Password Data Format
Word
Contents
0
Control Word
bit 15-1 Reserved
bit 0
Identifier
0 = Compare user password, 1 = Compare master password
1-16
Password (32bytes)
17-255 Reserved
Device returns aborted command error if the device is in Locked mode, or the device is in Frozen mode.