11.10 Protected Area Function. 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

Table 53: Command table for device lock operation

Security Erase Unit

Security Freeze Lock o x o o

Security Set Password

Security Unlock

Seek x o o o o o x o x x o

Write Long

Write Multiple

Write Multiple EXT

Write Sector(s)

Write Sector(s) EXT

Write Verify x x x x x x o o o o o o o o o o o o

11.10 Protected Area Function

Protected Area Function provides a protected area which cannot be accessed via conventional methods. This protected area is used to contain critical system data such as BIOS or system management information. The contents of the entire system main memory may also be dumped into the protected area to resume after a system power off.

The LBA/CYL changed by the following commands affects the Identify Device Information.

Two commands are defined for this function:

• Read Native Max ADDRESS ('F8'h)

• Set Max ADDRESS ('F9'h)

Four security extension commands are implemented as sub functions of the Set Max ADDRESS:

• Set Max SET PASSWORD

• Set Max LOCK

• Set Max FREEZE LOCK

• Set Max UNLOCK

11.10.1 Example for operation (In LBA Mode)

The following example uses hypothetical values.

Device characteristics:

Capacity (native)

Max LBA (native)

Required size for protected area

Required blocks for protected area

Customer usable device size

Customer usable sector count

LBA range for protected area

536,870,912 bytes (536MB)

1,048,575 (0FFFFFh)

8,388,608 bytes

16,384 (004000h)

528,482,304 bytes (528MB)

1,032,192 (0FC000h)

0FC000h to 0FFFFFh

1. Shipping drives from the drive manufacturer

When the drive is shipped from the manufacturer, the device has been tested to have a capacity of 536MB, flagging the media defects not visible by the system.

2. Preparing drives at system manufacturer

Special utility software is required to define the size of the protected area and to store the data in it. The sequence is:

Travelstar 80GN Hard Disk Drive Specification

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