Seagate Ultra 160 User Manual download pdf (Page 99)

Parallel SCSI Interface Product Manual, Rev. A 85

Table 26: Extended Message Codes

1. The EXTENDED MESSAGE ARGUMENTS are specified within the Extended Message Descriptions

in Paragraphs referenced in Table

27.

4.3 Message categories

The messages supported by the various drives are divided up into categories and listed in tables in the follow-

ing subsections. The individual drive’s Product Manual. Table 27 lists messages that are supported by the par-

ticular drive. In the tables, the message code values are given a direction specification (In-Out). Detailed

descriptions follow the tables. Messages other than those supported by a drive are answered by the drive with

a MESSAGE REJECT message.

4.3.1 LINK CONTROL MESSAGES

Table 27: Link Control message codes

Code Extended message

00h MODIFY DATA POINTERS

01h SYNCHRONOUS DATA TRANSFER REQUEST

02h Reserved

03h WIDE DATA TRANSFER REQUEST

04h PARALLEL PROTOCOL REQUEST

05h MODIFY BIDIRECTIONAL DATA POINTER

06h - FFh Reserved

Code

Support

Message name

Reference

section

Direction

Clear

attention

condition

IU transfers

disabled

IU transfers

enabled

Init Targ Init Targ In Out

04h O O O O DISCONNECT 4.3.2 In Out Yes

80h+ M O NS NS IDENTIFY 4.3.3 In N/A

80h+ M M NS NS

IDENTIFY

4.3.3 Out

Not

required

23h O O NS NS IGNORE WIDE RESIDUE 4.3.4 In N/A

05h M M M M

INITIATOR DETECTED

ERROR

4.3.5 Out Yes

0Ah O O NS NS

LINKED COMMAND

COMPLETE

In N/A

09h M M M M

MESSAGE PARITY

ERROR

4.3.7 Out Yes

07h M M M M MESSAGE REJECT 4.3.8 In Out Yes

01h,05h,00h O O O O MODIFY DATA POINTER 4.3.9 In N/A

01h,09h,05h O O O O

MODIFY BIDIREC-

TIONAL DATA POINTER

4.3.9 In N/A

08h M M M M NO OPERATION 4.3.11 Out Ye s

01h,06h,04h M M M M

PARALLEL PROTOCOL

REQUEST

4.3.12 In Out Yes

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 185 186

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