Security Unlock (F2H); Table 91: Security Unlock (F2H) - Hitachi HTS541010G9AT00 - Travelstar 100 GB Hard Drive Specifications

12.30 Security Unlock (F2h)

Table 91: Security Unlock (F2h)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
7 6 5
CRC UNC 0
0 0 0
This command unlocks the password and causes the device to enter device unlock mode. If COMRESET with
Software Setting Preservation disable or power on reset is done without executing the Security Disable Password
command after this command is completed, the device will be in device lock mode. The password has not been
changed yet.
The Security Unlock command requests to transfer a single sector of data from the host including information spec-
ified in "Security Unlock Information" on page 112.
If the Identifier bit is set to master and the file is in high security mode then the password supplied will be com-
pared with the stored master password. If the file is in maximum security mode then the security unlock will be
rejected.
If the Identifier bit is set to user, then the file 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 attempt
counter. This counter is initially set to 5 and is decremented for each password mismatch. When this counter
reaches zero then all password protected commands are rejected until a power off.
Word
00 Control Word
bit 0
bit 1-15
01-16 Password (32 bytes)
17-255 Reserved
Identifier
A zero indicates that the device regards Password as the User Password. A one indicates that the device regards
Password as the Master Password.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 - - - - -
1 1 1 1 0 0 1 0
Error Register
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Description
: Identifier (1- Master, 0- User)
: Reserved
Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
0 7 6
BSY RDY DF DSC DRQ
0 0 V
134
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
5 4 3 2
COR IDX
0 - - 0
1 0
ERR
- V