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Table 53: Command table for device lock operation
Security Erase Unit
Security Freeze Lock
Security Set Password
Security Unlock
Seek
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
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:
o
o
x
x
o
o
x
o
x
o
o
x
o
o
o
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
Travelstar 80GN Hard Disk Drive Specification
Write Long
Write Multiple
Write Multiple EXT
Write Sector(s)
Write Sector(s) EXT
Write Verify
83
x
o
o
x
o
o
x
o
o
x
o
o
x
o
o
x
o
o
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