Interface Requirements; General Description; Scsi Interface Messages Supported - Seagate ST318404LW Product Manual

Cheetah 18XL Product Manual, Rev. A
9.0

Interface requirements

This section partially describes the interface requirements as implemented on the drives.
9.1

General description

This section describes in essentially general terms the interface requirements supported by the Cheetah 18XL.
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.
9.2

SCSI interface messages supported

Table 5 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Cheetah 18XL family drives.
Table 5: SCSI messages supported by Cheetah 18XL family drives
Message name
Abort
Abort-tag
Bus device reset
Clear ACA
Clear queue
Command complete
Continue I/O process
Disconnect
Extended messages
Identify
Ignore wide residue (two bytes)
Initiate recovery
Initiator detected error
Linked command complete
Linked command complete with flag
Message parity error
Message reject
Modify data pointer
No operation
Parallel Protocol Request
Queue tag messages (two bytes)
ACA
Head of queue tag
Ordered queue tag
Simple queue tag
Release recovery
Restore pointers
Save data pointer
Synchronous data transfer req.
Target transfer disable
Terminate I/O process
Wide data transfer request
Supported by
Message code SCSI-2/3
06h Y
0Dh Y
0Ch Y
16h N
0Eh Y
00h Y
12h Y
04h Y
01h[1] Y
80h-FFh Y
23h Y
0Fh N
05h Y
0Ah Y
0Bh Y
09h Y
07h Y
[1] N
08h Y
[1] [2] Y
24h N
21h Y
22h Y
20h Y
10h N
03h Y
02h Y
[1] Y
13h Y
11h Y
[1] Y
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