Fujitsu MBC2073RC, MBC2036RC, MBA3300RC, MBA3147RC Response information unit, Datapres field

SAS Interface

1.6.2.5RESPONSE information unit

Table 1.41 defines the response IU. The RESPONSE frame is sent by an SSP TARG port to deliver SCSI status (e.g., GOOD or CHECK CONDITION) and sense data, or to deliver SSP-specific status (e.g., illegal frame format). The maximum size of the RESPONSE frame is the maximum size of any IU in an SSP frame.

Table 1.41 RESPONSE information unit

Bit	7	6		5	4		3	2	1	0
Byte
0						Reserved
9
10				Reserved					DATAPRES
11						STATUS
12						Reserved
15
16	(MSB)			SENSE DATA LENGTH (n bytes)
19										(LSB)
20	(MSB)		REPONSE DATA LENGTH (m bytes)
23										(LSB)
24			RESPONSE DATA (DATAPRES: 01h)
23+m
24+m				SENSE DATA (DATAPRES: 10b)
23+m+n

Table 1.42 defines the DATAPRES field.

Table 1.42 DATAPRES field

Code	Name	Description
00b	NO_DATA	The SENSE DATA LENGTH field is zero, and the
		RESPONSE DATA LENGTH is zero.
01b	RESPONSE_DATA	The SENSE DATA LENGTH field is zero, and the
		RESPONSE DATA LENGTH is four.
10b	SENSE_DATA	The SENSE DATA LENGTH field is 48, and the
		RESPONSE DATA LENGTH is zero.
11b	Reserved

The SSP TARG port shall return a RESPONSE frame with the DATAPRES field set to NO_DATA if a command completes without response data or sense data to return.

92 C141-C013