Table 148 Security Unlock Command (F2H); Security Unlock (F2H) - Hitachi CinemaStar P7K500 Specifications

10.36 Security Unlock (F2h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0 IDN
0 V 0

Table 148 Security Unlock Command (F2h)

This command unlocks the password and causes the device to enter device unlock mode. If power on reset or
hard 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
specified in Table 148 on the page 198.
If the Identifier bit is set to master and the file is in high security mode then the password supplied will be
compared 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.
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 1 0 0 1 0
4 3 2 1 0
0 ABT T0N AMN
0 0 V 0 0
Command Block Input Registers
Register 7 6
Data - -
Error
Sector Count - -
Sector Number - -
Cylinder Low - -
Cylinder High - -
Device/Head - -
Status
Status Register
7 6 5 4
BSY RDY DF DSC DRQ COR IDX ERR
0 V 0 -
197
5 4 3 2 1 0
- - - - - -
...See Below...
- - - - - -
- - - - - -
- - - - - -
- - - - - -
- - - - - -
...See Below...
3 2 1 0
- 0 - V