Sony SDX-800V/R manual Mode Sense 6/10 1Ah and 5Ah, Mode Sense 6 CDB Format, Dbd, Pcf, Llbaa DBD

6.Command Specification MODE SENSE

6.8.MODE SENSE (6/10) 1Ah and 5Ah

Table 6-49: Mode Sense (6) CDB Format

	7		6	5	4		3		2	1	0
0						Operation	Code (1Ah)
1			Reserved				DBD			Reserved
2		PCF					Page	Code
3						Reserved
4						Allocation Length
5	Vendor Specific (00b)					Reserved			NACA (0)	Flag (0)	Link (0)
			Table 6-50: Mode Sense (10) CDB Format
	7		6	5	4		3		2	1	0
0						Operation	Code (5Ah)
1			Reserved			LLBAA (0)	DBD			Reserved
2		PCF					Page	Code
3-6						Reserved
7-8						Allocation Length
5	Vendor Specific (00b)					Reserved			NACA (0)	Flag (0)	Link (0)

The MODE SENSE (6/10) commands provide a means to report its default, current and changeable configuration parameters. They are complementary to MODE SELECT (6/10) commands. The 6-byte and 10-byte commands can be interchanged.

The format of the data returned is different for the six and ten byte commands. See the MODE SELECT (6/10) commands for the mode header format differences.

LLBAA: The LLBAA function is not supported. This field must be ZERO. This field is defined for MODE SENSE 10 only.

If this field is not set to 0b for a MODE SENSE (10) command, the command terminates with CHECK CONDITION status, the sense key set to ILLEGAL REQUEST, the ASC/ASCQ is set to INVALID FIELD IN CDB.

DBD: A Disable Block Descriptors (DBD) bit of ZERO indicates that the target may return ZERO or more block descriptors in the returned MODE SENSE data at the target's discretion. A DBD bit of one specifies that the target shall not return any block descriptors in the returned MODE SENSE data.

PC: The Page Control field indicates the type of page parameter values to be returned to the Host as shown below.

Table 6-51: Page Control field values

Bit 7	Bit 6	Parameter Values	Description
0	0	Current Values	This is the normal default situation where the drive returns to the host
			its current configuration. Page fields not supported are set to ZERO by
			the drive.
0	1	Changeable Values	These are any values which a host may alter in a subsequent MODE
			SELECT command. Any field that the drive allows to be changed is set
			to one. Otherwise the field is set to ZERO.
1	0	Default Values	These are the default values on power-up
1	1	Saved Values	Not supported by the drive

The addition page length field of each page returned by the drive indicates the number of bytes supported for that page. Fields not supported by the drive are set to ZERO.

Page Code: This allows the Host to select any specific or all pages supported by the drive. The page codes that are supported are:

6-56 SONY AIT-3Ex drive SDX-800V series Ver.1.1