Barracuda 4LP Product Manual, Rev. D
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9.0
Interface requirements
This section describes Barracuda 4LP interface requirements.
9.1
General description
This section partially describes the interface requirements as implemented on the drives. The major portion
of the interface requirements /implementation is described in the Seagate SCSI Interface Product Manual,
P/N 77738479. This section has tables that give the Barracuda 4LP Family drive's version of the SCSI imple-
mentation described in the SCSI Interface Product Manual.
9.2
SCSI interface messages supported
Table 5 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Barracuda 4LP Family drives.
Notes.
[1]
Extended messages (see P/N 77738479 SCSI Interface Product Manual).
[2]
Not applicable to “N” models.
Table 5:
SCSI messages supported by Barracuda 4LP family drives
Message Name
Message Code
Supported by
SCSI-2/3
Abort
06h
Y
Abort-tag
0Dh
Y
Bus device reset
0Ch
Y
Clear queue
0Eh
Y
Command complete
00h
Y
Continue I/O process
12h
Y
Disconnect
04h
Y
Extended messages
01h[1]
Y
Identify
80h-FFh
Y
Ignore wide residue (two bytes)
23h
Y
Initiate recovery
0Fh
N
Initiator detected error
05h
Y
Linked command complete
0Ah
Y
Linked command complete with flag
0Bh
Y
Message parity error
09h
Y
Message reject
07h
Y
Modify data pointer
[1]
N
No operation
08h
Y
Queue tag messages (two bytes)
Head of queue tag
21h
Y
Ordered queue tag
22h
Y
Simple queue tag
20h
Y
Release recovery
10h
N
Restore pointers
03h
Y
Save data pointer
02h
Y
Synchronous data transfer req.
[1]
Y
Target transfer disable
13h
Y
Terminate I/O process
11h
N
Wide data transfer request
[1] [2]
Y
