Seagate ST15150N Product Manual - Page 69

ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D

59

11.0

Interface requirements

This section describes the interface requirements as implemented on

Barracuda 4 drives.

ASA I is Seagate’s first generation of Advanced SCSI Architecture firmware.

ASA II is Seagate’s second generation of Advanced SCSI Architecture

firmware.

11.1

General description

The major portion of the interface requirements/implementation is described

in the

SCSI-2 Interface Product Manual

(part number 77738479).

11.2

SCSI interface messages supported

Table 4 lists the messages supported by the Barracuda 4 drives SCSI-1

and SCSI-2 modes.

Table 4. SCSI messages supported

Supported by:

Msg

ASA I

ASA I

ASA II

Message name

code

SCSI-1

SCSI-2

SCSI-2

Abort

06h

Y

Y

Y

Abort tag

0Dh

Y

Y

Y

Bus device reset

0Ch

Y

Y

Y

Clear queue

0Eh

N

Y

Y

Command complete

00h

Y

Y

Y

Continue I/O Process

12h

N

N

Y

Disconnect

04h

Y

Y

Y

Extended messages

01h***

Y

Y

Y

Identify

80h-FFh

Y

Y

Y

Ignore wide residue (two bytes)

23h

N

N

Y

Initiate recovery

0Fh

N

N

N

Initiator detected error

05h

Y

Y

Y

Linked command complete

0Ah

Y

Y

Y

Linked command complete with flag

0Bh

Y

Y

Y

Message parity error

09h

Y

Y

Y

Message reject

07h

Y

Y

Y

Modify data pointer

***

N

N

N

No operation

08h

Y

Y

Y

Queue tag messages (two bytes)

Head of queue tag

21h

N

Y

Y

Ordered queue tag

22h

N

Y

Y

Simple queue tag

20h

N

Y

Y

Release recovery

10h

N

N

N

Restore pointers

03h

Y

Y

Y

Save data pointer

02h

Y

Y

Y

Synchronous data transfer request

***

Y

Y

Y

Target transfer disable

13h

N

N

Y

Terminate I/O process

11h

N

N

Y

Wide data transfer request

***

N

Y

Y

*** Extended messages (see the

SCSI-2 Interface Product Manual)

Seagate ST15150N Product Manual - Page 69

Interface requirements - firmware

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