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11.8.39 SECURITY ERASE UNIT (F4h)
COMMAND CODE
1 1 1 1 0 1 0 0
REGISTER
REGISTER SETTING NORMAL COMPLETION
DR DRIVE No. no change
CY no change
HD no change
SN no change
SC no change
FT no change
This command must be issued immediately after the SECURITY ERASE PREPARE command.
This command requests to transfer a sector of data from the host including the data specified in the following
table. If the password does not match, the drive rejects the command with an Aborted command error.
Security Erase Unit Information
Word Content
0 Control word
Bit 15-1 Reserved
Bit 0 Identifier 0=compare user password
1=compare master password
1-16 Password (32 bytes)
17-255 Reserved
The SECURITY ERASE UNIT command erases all user data. The SECURITY ERASE PREPARE command
must be completed immediately prior to the SECURITY ERASE UNIT command, otherwise, the SECURITY
ERASE UNIT command shall be aborted..
This command disables the drive lock function, however, the master password is still stored internally within
the drive and may be reactivated later when a new user password is set.
11.8.40 SECURITY FREEZE LOCK (F5h)
COMMAND CODE
1 1 1 1 0 1 0 1
REGISTER
REGISTER SETTING NORMAL COMPLETION
DR DRIVE No. no change
CY no change
HD no change
SN no change
SC no change
FT no change
The SECURITY FREEZE LOCK allows the drive to enter frozen mode. After the completion of this command,
any other commands that update the drive lock functions are rejected. The drive recovers from the frozen
mode by power-on reset or hard reset. If SECURITY FREEZE LOCK is issued when the drive is in frozen
mode, the drive executes the command and remains in frozen mode.
Following commands are rejected when the drive is in SECURITY FREEZE LOCK mode.
• SECURITY SET PASSWORD
• SECURITY UNLOCK
• SECURITY DISABLE PASSWORD
• SECURITY ERASE PREPARE
• SECURITY ERASE UNIT