10.7. SCSI Data-Out & SCSI Data-In
10.7. SCSI 데이터 출력 및 SCSI 데이터 입력
The SCSI Data-Out PDU for WRITE operations has the following format:
WRITE 작업을 위한 SCSI 데이터 출력 PDU의 형식은 다음과 같습니다:
Byte/ 0 | 1 | 2 | 3 |
/ | | | |
|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|
+---------------+---------------+---------------+---------------+
0|.|.| 0x05 |F| Reserved |
+---------------+---------------+---------------+---------------+
4|TotalAHSLength | DataSegmentLength |
+---------------+---------------+---------------+---------------+
8| LUN or Reserved |
+ +
12| |
+---------------+---------------+---------------+---------------+
16| Initiator Task Tag |
+---------------+---------------+---------------+---------------+
20| Target Transfer Tag or 0xffffffff |
+---------------+---------------+---------------+---------------+
24| Reserved |
+---------------+---------------+---------------+---------------+
28| ExpStatSN |
+---------------+---------------+---------------+---------------+
32| Reserved |
+---------------+---------------+---------------+---------------+
36| DataSN |
+---------------+---------------+---------------+---------------+
40| Buffer Offset |
+---------------+---------------+---------------+---------------+
44| Reserved |
+---------------+---------------+---------------+---------------+
48| Header-Digest (Optional) |
+---------------+---------------+---------------+---------------+
/ DataSegment /
+/ /
+---------------+---------------+---------------+---------------+
| Data-Digest (Optional) |
+---------------+---------------+---------------+---------------+The SCSI Data-In PDU for READ operations has the following format:
READ 작업을 위한 SCSI 데이터 입력 PDU의 형식은 다음과 같습니다:
Byte/ 0 | 1 | 2 | 3 |
/ | | | |
|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|
+---------------+---------------+---------------+---------------+
0|.|.| 0x25 |F|A|0 0 0|O|U|S| Reserved |Status or Rsvd |
+---------------+---------------+---------------+---------------+
4|TotalAHSLength | DataSegmentLength |
+---------------+---------------+---------------+---------------+
8| LUN or Reserved |
+ +
12| |
+---------------+---------------+---------------+---------------+
16| Initiator Task Tag |
+---------------+---------------+---------------+---------------+
20| Target Transfer Tag or 0xffffffff |
+---------------+---------------+---------------+---------------+
24| StatSN or Reserved |
+---------------+---------------+---------------+---------------+
28| ExpCmdSN |
+---------------+---------------+---------------+---------------+
32| MaxCmdSN |
+---------------+---------------+---------------+---------------+
36| DataSN |
+---------------+---------------+---------------+---------------+
40| Buffer Offset |
+---------------+---------------+---------------+---------------+
44| Residual Count |
+---------------+---------------+---------------+---------------+
48| Header-Digest (Optional) |
+---------------+---------------+---------------+---------------+
/ DataSegment /
+/ /
+---------------+---------------+---------------+---------------+
| Data-Digest (Optional) |
+---------------+---------------+---------------+---------------+Status can accompany the last Data-In PDU if the command did not end with an exception (i.e., the status is "good status" - GOOD, CONDITION MET or INTERMEDIATE CONDITION MET).
명령이 예외로 끝나지 않은 경우 상태는 마지막 Data-In PDU와 함께 표시될 수 있습니다 (즉, 상태는 "양호한 상태" - GOOD, CONDITION MET 또는 INTERMEDIATE CONDITION MET).
The presence of status(and of a residual count) is signaled though the S flag bit.
상태 (및 잔여 카운트)의 존재는 S 플래그 비트를 통해 신호됩니다.
Although targets MAY choose to send even non-exception status in separate responses, initiators MUST support non-exception status in Data-In PDUs.
타겟은 별도의 응답으로 비예외 상태도 전송하도록 선택할 수 있지만 이니시에이터는 Data-In PDU에서 비예외 상태를 지원해야 합니다.