Response Information Unit; Table 1.41 Response Information Unit; Table 1.42 Datapres Field - Fujitsu MAU3147RC SERIES Technical Manual

Serial Attached SCSI (SAS) Interface
1.6.2.5

RESPONSE 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.
Bit
Byte
0
9
10
11
12
15
16 (MSB)
19
20 (MSB)
23
24
23+m
24+m
23+m+n
Table 1.42 defines the DATAPRES field.
Code Name
00b NO_DATA
01b RESPONSE_DATA
10b SENSE_DATA
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.
1-72

Table 1.41 RESPONSE information unit

7 6 5
Reserved
SENSE DATA LENGTH (n bytes)
REPONSE DATA LENGTH (m bytes)
RESPONSE DATA (DATAPRES: 01h)
SENSE DATA (DATAPRES: 10b)

Table 1.42 DATAPRES field

The SENSE DATA LENGTH field is zero, and the
RESPONSE DATA LENGTH is zero.
The SENSE DATA LENGTH field is zero, and the
RESPONSE DATA LENGTH is four.
The SENSE DATA LENGTH field is 48, and the
RESPONSE DATA LENGTH is zero.
4
3 2
Reserved
STATUS
Reserved
Description
1
0
DATAPRES
(LSB)
(LSB)
C141-C009