Seagate ST39205LW/LC, ST318405LW/LC Interface requirements, Scsi interface messages supported

Cheetah 36XL Product Manual, Rev. E 45

9.0Interface requirements

This section partially describes the interface requirements as implemented on the drives.

9.1General description

This section describes in essentially general terms the interface requirements supported by the Cheetah 36XL. No attempt is made to describe all of the minute details of conditions and constraints that must be considered by designers when designing a system in which this family of drives can properly operate. Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with exceptions as noted herein or in the Seagate SCSI Interface Product Manual, part number 75789509.

9.2SCSI interface messages supported

Table 4 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Cheetah 36XL family drives.

Table 4: SCSI messages supported by Cheetah 36XL family drives

		Supported by
Message name	Message code	SCSI-2/3
Abort	06h	Y
Abort-tag	0Dh	Y
Bus device reset	0Ch	Y
Clear ACA	16h	N
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
Parallel Protocol Request	[1] [2]	Y
Queue tag messages (two bytes)
ACA	24h	N
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	Y
Wide data transfer request	[1]	Y

Notes.

[1]Extended messages (see the SCSI Interface Product Manual, part number 75789509).

[2]Supports all options except qas_req and iu_req.