Hitachi HTS543212L9SA00, HTS543280L9A300 manual Device Configuration Identify subcommand C2h

5K320 SATA OEM Specification

14.2.3DEVICE CONFIGURATION IDENTIFY (subcommand C2h)

The DEVICE CONFIGURATION IDENTIFY command returns a 512 byte data structure via PIO data-in transfer. The content of this data structure indicates the selectable commands, modes, and feature sets that the device is capable of supporting. If a DEVICE CONFIGURATION SET command has been issued reducing the capabilities, the response to an IDENTIFY DEVICE or ID ENTIFY PACKET DEVICE command will reflect the reduced s e t of capabilities, while the DEVICE CONFIGURATION IDENTIFY command will reflect the entire set of selectable capabilities.

The format of the Device Configuration Overlay data structure is shown on next page.

14.2.4DEVICE CONFIGURATION SET (subcommand C3h)

The DEVICE CONFIGURATION SET command allows a device manufacturer or a personal computer system manufacturer to reduce the set of optional commands, modes, or feature sets supported by a device as indicated by a DEVICE CONFIGURATION IDENTIFY command. The DEVICE CONFIGURATION SET command transfers an overlay that modifies some of the bits set in words 63, 78, 79, 82, 83, 84, and 88 of the IDENTIFY DEVICE command response. When the bits in these words are cleared, the device no longer supports the indicated command, mode, or feature set. If a bit is set in the overlay transmitted by the device that is not set in the overlay received from a DEVICE CONFIGURATION IDENTIFY command, no action is taken for that bit.

The format of the overlay transmitted by the device is described in the table at next page. The restrictions on changing these bits are described in the text following that table. If any of the bit modification restrictions described are violated or any setting is changed with DEVICE CONFIGURATION SET command, the device shall return command aborted. At that case, error reason code is returned to sector count register, invalid word location is returned to LBA High register, and invalid bit location is returned to LBA Mid register. The Definition of error information is shown on the next page.

ERROR INFORMATION EXAMPLE 1:

After establish a protected area with SET MAX address, if a user attempts to execute DC SET or DC RESTORE, device abort that command and return error reason code as below.

LBA High	: 03h	= word 3 is invalid
LBA Mid	: 00h	this register is not assigned in this case
Sector count	: 06h	= Protected area is now established

ERROR INFORMATION EXAMPLE 2:

When device is enabled the Security feature set, if user attempts to disable that feature, device abort that command and return error reason code as below.

LBA High	: 07h	= word 7 is invalid
LBA Mid	: 08h	= bit 3 is invalid
Sector count	: 04h	= now Security feature set is enabled

81