SLCF2GM2TU-S STEC, SLCF2GM2TU-S Datasheet - Page 61

• Manufacturer Part Number: SLCF2GM2TU-S
• Manufacturer: STEC

Specifications of SLCF2GM2TU-S

• Lead Free Status / Rohs Status: Compliant

SLCFxxxM2TU(I)(-x)
Datasheet
9.0 Host Protected Area Feature Set
Note: Part Numbers with -S support the Host Protected Area feature set.
The Host Protected Area (HPA) feature set allows data storage outside the normal OS file system when
the card is initially configured.
For example, during initialization the BIOS can obtain full access to the card by issuing a SET MAX
ADDRESS to the card’s native address. The BIOS can read hidden configuration data, and then when
exiting initialization, the BIOS issue another SET MAX ADDRESS command to lower the maximum
address and hide the configuration data from the OS.
The SET MAX ADDRESS command also allows the maximum address to be volatile (card returns to the
last set maximum address after power or hardware reset cycle) or non-volatile, (card retains the set
maximum address after a power or reset cycle).
When the BIOS receives control prior to power down, the BIOS can READ NATIVE MAX ADDRESS, then
issue a volatile SET MAX ADDRESS to the native maximum address. The BIOS can write configuration
data to the HPA. On power down, the maximum address returns to the last non-volatile setting.
9.1
When HPA feature set is implemented, the IDENTIFY DRIVE Command returns the following information
for Words 82, 83, 85, and 86:



9.2
HPA command set is invoked by writing the command code to the Command Register. Refer to Table 33
for a description of the supported Security Commands.
READ NATIVE MAX
ADDRESS
SET MAX ADDRESS
Word 82 bit 10 shall be set to ―1‖ to configure the card for Host Protected Area feature set support.
Word 85 bit 10 shall be set to ―1‖ to at power on to indicate that Host Protected Area feature set is enabled.
Words 83 and 86 bit 8 shall be cleared to ―0‖ to indicate that SET MAX SECURITY EXT is not supported.
HPA Feature Set Support and Identify Command
HPA Commands
Command
Code
F8
F9
This command returns the native maximum address. The native
maximum address is the highest address accepted by the device in the
factory default condition. The native maximum address is the maximum
address that is valid when using the SET MAX ADDRESS command.
After successful command completion, all read and write access attempts
to addresses greater than specified by the successful SET MAX
ADDRESS command shall be rejected with an IDNF error. After a
successful SET MAX ADDRESS command using a new maximum LBA
the content of IDENTIFY DEVICE words (61:60) shall be equal to the new
Maximum LBA + 1. More than one non-volatile SET MAX ADDRESS
command after a power-on or hardware reset will report an IDNF error.
61000-07000-104, April 2011
Table 32: HPA Commands
Description
CompactFlash Card
61