IBM IC35L036UWDY10 Hard Drive Specifications - Page 193

SCSI message system, 1 Supported Messages

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10.0 SCSI Message System This chapter describes how the message system is implemented on the drive. Included is a functional description of the supported messages. 10.1 Supported Messages The messages supported by the drive are listed in the figure below. MESSAGE CODE (hex) Direction Negate ATN before last ACK TASK COMPLETE 00 IN --- SYNCHRONOUS DATA TRANSFER REQUEST 010301 IN OUT Yes WIDE DATA TRANSFER REQUEST* 010203 IN OUT Yes PARALLEL PROTOCOL REQUEST 010604 IN OUT Yes SAVE DATA POINTER 02 IN --- RESTORE POINTERS 03 IN --- DISCONNECT 04 IN OUT --- INITIATOR DETECTED ERROR 05 OUT Yes ABORT TASK SET 06 OUT Yes MESSAGE REJECT 07 IN OUT Yes NO OPERATION 08 OUT Yes MESSAGE PARITY ERROR 09 OUT Yes LINKED COMMAND COMPLETE 0A IN --- LINKED COMMAND COMPLETE (w/FLAG) 0B IN --- TARGET RESET 0C OUT Yes ABORT TASK 0D OUT Yes CLEAR TASK SET 0E OUT Yes SIMPLE 20XX IN OUT No HEAD OF QUEUE 21XX OUT No ORDERED 22XX OUT No IGNORE WIDE RESIDUE* 2301 IN --- IDENTIFY 80-FF IN --- IDENTIFY 80-FF OUT No Key: IN = Drive to Initiator OUT = Initiator to Drive YES = Initiator shall negate ATN before last ACK of message NO = Initiator may or may not negate ATN before last ACK of message --- = Not applicable XX = Queue Tag * = Wide SCSI Only Figure 177. Supported Messages Ultrastar 146Z10 hard disk drive specifications 177

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10.0 SCSI Message System
This chapter describes how the message system is implemented on the drive. Included is a functional
description of the supported messages.
10.1 Supported Messages
The messages supported by the drive are listed in the figure below.
Negate ATN
before last
ACK
Direction
CODE (hex)
MESSAGE
TASK COMPLETE
00
IN
–––
SYNCHRONOUS DATA TRANSFER REQUEST
010301
IN
OUT
Yes
WIDE DATA TRANSFER REQUEST*
010203
IN
OUT
Yes
PARALLEL PROTOCOL REQUEST
010604
IN
OUT
Yes
SAVE DATA POINTER
02
IN
–––
RESTORE POINTERS
03
IN
–––
DISCONNECT
04
IN
OUT
–––
INITIATOR DETECTED ERROR
05
OUT
Yes
ABORT
TASK SET
06
OUT
Yes
MESSAGE REJECT
07
IN
OUT
Yes
NO OPERATION
08
OUT
Yes
MESSAGE PARITY ERROR
09
OUT
Yes
LINKED COMMAND COMPLETE
0A
IN
–––
LINKED COMMAND COMPLETE (w/FLAG)
0B
IN
–––
TARGET RESET
0C
OUT
Yes
ABORT TASK
0D
OUT
Yes
CLEAR TASK SET
0E
OUT
Yes
SIMPLE
20XX
IN
OUT
No
HEAD OF QUEUE
21XX
OUT
No
ORDERED
22XX
OUT
No
IGNORE WIDE RESIDUE*
2301
IN
–––
IDENTIFY
80-FF
IN
–––
IDENTIFY
80-FF
OUT
No
Key: IN = Drive to Initiator
OUT = Initiator to Drive
YES = Initiator shall negate ATN before last ACK of message
NO = Initiator may or may not negate ATN before last ACK of message
––– = Not applicable
XX = Queue Tag
*
= Wide SCSI Only
Figure 177. Supported Messages
Ultrastar 146Z10 hard disk drive specifications
177