Product manual

Barracuda 4LP Product Manual, Rev. D 41

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