Security Unlock [F2H] - Hitachi C4K60 - Travelstar Slim - Hard Drive Specifications

7.5.33. Security Unlock [F2h]

Task File Registers
Command
LBA High
LBA Mid
LBA Low
Device/Head
Sector Count
Features
The SECURITY UNLOCK command requests a transfer of a single sector of data from the host. The
following table defines the content of this sector of information.
Word
0 Control Word
bit 15-1
bit 0
1-16 Password(32bytes)
17-255 Reserved
If the Identifier bit is set to master and the device is in high security level, then the password supplied is
compared with the stored master password. If the device is in maximum security level, then the SECURITY
UNLOCK command is rejected. If the Identifier bit is set to user, then the device compares the supplied
password with the stored user password.
If the password compare fails then the device returns an abort error to the host and decrements the unlock
counter. This counter is initially set to five and is decrement for each password mismatch when SECURITY
UNLOCK command is issued and the device is locked. When this counter reaches zero then SECURITY
UNLOCK and SECURITY ERASE UNIT commands are aborted until a power-on reset or a hard reset.
SECURITY UNLOCK command issued when the device is unlocked have no effect on the unlock counter.
The device returns aborted command error if the device is in Frozen mode.
K6610170
Rev.2
Dec 22, 2004
7 6
X X
Table 7.24 Password Data Format
Reserved
Identifier 0 = Compare user password, 1 = Compare master password
5 4 3 2
F2h
XX
XX
XX
X DRV X X
XX
XX
Contents
- 95 -
1 0
X X