Hitachi 100GB 7200 RPM HTE721010G9SA00 User Manual
Product codes
HTE721010G9SA00
Travelstar E7K100 (Serial ATA) Hard Disk Drive Specification
59
10.10 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.
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)
• 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
• Set Max LOCK
• Set Max FREEZE LOCK
• Set Max UNLOCK
10.10.1 Example for operation (In LBA Mode)
The following example uses hypothetical values.
Device characteristics:
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 536 MB,
flagging the media defects not visible by the system.
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:
sequence is:
Issue Read Native Max ADDRESS command to get the real device max of LBA/CYL. Returned value shows
that native device Max LBA is 0FFFFFh regardless of the current setting.
that native device Max LBA is 0FFFFFh regardless of the current setting.
Make the entire device accessible, including the protected area, by setting the device Max LBA as 0FFFFFh
via Set Max ADDRESS command. The option could be either nonvolatile or volatile.
via Set Max ADDRESS command. The option could be either nonvolatile or volatile.
Security Set Password
x
o
x
Write Sector(s) EXT
x
o
o
Security Unlock
o
o
x
Write Verify
x
o
o
Capacity (native)
536,870,912 bytes (536MB)
Max LBA (native)
1,048,575 (0FFFFFh)
Required size for protected area
8,388,608 bytes
Required blocks for protected area
16,384 (004000h)
Customer usable device size
528,482,304 bytes (528MB)
Customer usable sector count
1,032,192 (0FC000h)
LBA range for protected area
0FC000h to 0FFFFFh
Table 35: Command table for device lock operation