13.27 Security Erase Unit (F4h). Hitachi IC25N080ATMR04, IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD, IC25N080ATMR04-0 - 3E034 - Dell 80GB Laptop Hard Drive, Travelstar 80GN, IC25N020ATMR04, 08K0910, IC25N040ATMR04, IC25N060ATMR04, IC25N030ATMR04

13.27 Security Erase Unit (F4h)

Table 99: Security Erase Unit (F4h)

Command Block Output Registers

Register

Data

Feature

Sector Count

LBA Low

LBA Mid

LBA High

Device

Command

7 6 5 4 3 2 1 0

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

1 - 1 D - - - -

1 1 1 1 0 1 0 0

Error Register

7 6 5 4 3 2 1 0

CRC UNC 0 IDN 0 ABT T0N AMN

0 0 0 0 0 V 0 0

Command Block Input Registers

Register

Data

Error

Sector Count

LBA Low

LBA Mid

LBA High

Device

Status

7 6 5 4 3 2 1 0

- - - - - - - see below

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - - see below

Status Register

7 6 5 4 3 2 1 0

BSY RDY DF DSC DRQ COR IDX ERR

0 V 0 V 0 V

The Security Erase Unit command initializes all user data sectors and then disables the device lock function.

Note that the Security Erase Unit command initializes from LBA 0 to Native MAX LBA. The Host MAX LBA is set by the Initialize Drive Parameter or the Set MAX ADDRESS command is ignored. The protected area by the

Set MAX ADDRESS command is also initialized.

This command requests the transfer of a single sector of data from the host including information specified in the table below.

If the password does not match, the device rejects the command with an Aborted error.

Table 100: Erase Unit information

Word Description

00 Control Word

bit 0 : Identifier (1- Master, 0- User)

bit 1-15 : Reserved

01-16 Password (32 bytes)

17-255 Reserved

Identifier Zero indicates that the device should check the supplied password against the user password stored internally. One indicates that the device should check the given password against the master password stored internally.

The Security Erase Unit command erases all user data and disables the security mode feature (device lock function). After completing of this command, all the user data will be initialized to zero with a write operation. At this time, the data write is not verified with a read operation to determine if the data sector is initialized correctly. At this time the defective sector information and the reassigned sector information for the device are not updated. The security erase prepare command should be completed immediately prior to the Security Erase Unit command. If the device receives a Security Erase Unit command without a prior Security Erase Prepare command, the device aborts the security erase unit command.

Travelstar 80GN Hard Disk Drive Specification

145

This command disables the security mode feature (device lock function), however, the master password is still stored internally within the device and may be reactivated later when a new user password is set. If you execute this command on disabling the security mode feature (device lock function), the password sent by the host is NOT compared with the Master Password and the User Password. The device only erases all user data.

The execution time of this command for each model is shown below:

IC25N080ATMR04-0

IC25N060ATMR04-0

IC25N040ATMR04-0

IC25N030ATMR04-0

IC25N020ATMR04-0

66

50

34

26

18

Travelstar 80GN Hard Disk Drive Specification

146