Flag And Link Bits - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

SCSI-1 CCS SCSI-2
O M M
O O O
M M M
M M M
O O O
M M M
M M M
O O O
E M M
O O O
O M M
O M M
O O O
O O O
O O O
O M M
E M M
E M M
E M M
O O O
O O O
O O O
O O O
R R O
R R O
R O O
R O O
R R O
R R O
R R O
O O O
O O O
R R O
R R O
R R O
R R O
Figure 54. SCSI Commands Supported. (By Command Code)

7.1 Flag and Link Bits

Many of the structures in this section have fields names FLAG and LINK. The meaning of these fields is
defined below.
FLAG The Flag bit specifies which message the target shall return to the initiator if the link bit is one and
the command completes without any error. If Link is zero, Flag must also be zero. If Link is one
and the command terminates successfully, the file will send either the LINKED COMMAND
COMPLETE message ( F L A G = 0 ) or the LINKED COMMAND COMPLETE WITH FLAG
message ( F L A G = 1 ) . Typically this bit is used to cause an interrupt in the initiator between linked
commands.
64
O E M Spec. of DDRS-3xxxx
CODE COMMAND
00h TEST UNIT READY
01h REZERO UNIT
03h REQUEST SENSE
04h FORMAT UNIT
07h REASSIGN BLOCKS
08h READ
0Ah WRITE
0Bh SEEK
12h INQUIRY
15h MODE SELECT (6)
16h RESERVE (6)
17h RELEASE (6)
1Ah MODE SENSE (6)
1Bh START/STOP UNIT
1Ch RECEIVE DIAGNOSTICS
1Dh SEND DIAGNOSTICS
25h READ CAPACITY
28h READ EXTENDED
2Ah WRITE EXTENDED
2Bh SEEK EXTENDED
2Eh WRITE AND VERIFY
2Fh VERIFY
34h PRE-FETCH
35h SYNCHRONIZE CACHE
37h READ DEFECT DATA
3Bh WRITE BUFFER
3Ch READ BUFFER
3Eh READ LONG
3Fh WRITE LONG
41h WRITE SAME
4Ch LOG SELECT
4Dh LOG SENSE
55h MODE SELECT (10)
56h RESERVE (10)
57h RELEASE (10)
5Ah MODE SENSE (10)