Packetized L_Q IU type field changes

gop at gop at
Wed Dec 15 11:30:20 PST 1999

* From the T10 Reflector (t10 at, posted by:
* gop at

Yes, the "1" superscript in Fig. 56 (SPI-3 rev.11) applies ONLY to the SPI
L_Q/DATA portion of the words in parenthesis.
The target could send any valid status. That could be for example a
RESERVATION CONFLICT or an ACA ACTIVE in addition to either the QUEUE FULL
or BUSY.
Which is sent depends on the condition that has caused the target to stop
taking or not allow the command to be received.

Bye for now,
George Penokie

Dept Z9V  114-2 N212
E-Mail:    gop at
Internal:  553-5208
External: 507-253-5208   FAX: 507-253-2880

Sriram Srinivasan <srirams at> on 12/15/99 11:09:40 AM

Please respond to Sriram Srinivasan <srirams at>

To:   George Penokie/Rochester/IBM at IBMUS
cc:   t10 at
Subject:  RE: Packetized L_Q IU type field changes


> Mark,
> Breaking the stream of commands to send a status is definitely allowed.
> note and figure allow that to happen along with the text your referenced.

     Just to clarify this again; the "1" superscript in Fig. 56 (SPI-3
rev.11) applies ONLY to the SPI L_Q/DATA portion of the words in
right?  So like u said the target can send status to break a stream of
commands.  But my question is this:  Words in subclause 14.3.1 say

     "After transferring all the SPI command information unit bytes the
target shall change to a DT DATA IN phase and transmit a SPI status
unit with the status defined in the SCSI Architecture Model-2 standard for

     After reading SAM-2 I understand that the target can send either a
SET FULL or a BUSY.  Is this right?  Or is the target restricted to return
a TASK SET FULL status?

     Please clarify,



Sriram Srinivasan,
ASIC Design Engineer, LSI Logic,         Phone : (970) 206 5847
2001 Danfield Ct., Ft. Collins, CO 80525      FAX   : (970) 206 5244

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