FW: Error Recovery Ladder Diagrams, FCP_2 Rev 4, for O-O-O Recovery

Zeitler, Carl Carl.Zeitler at COMPAQ.com
Mon Apr 24 09:41:55 PDT 2000

* From the T10 Reflector (t10 at t10.org), posted by:
* "Zeitler, Carl" <Carl.Zeitler at compaq.com>
The Ladder diagrams have been updated to reflect the wishes of the T10/T11.3
ad hoc group.  See the pointer listed below.

The following changes were made:

1. Put SRR back in for Class 2 recovery
      D.3, D.5, D.5a, Class 2

2. D.5 Class 3,  Revert to doing REC and SRR on a closed Exchange

3. Generated two possible ways of recovering from lost ACK  to FCP_CONF,
Class 2--let's vote.         See D.?? Possibilities 1 and 2.

4. Made decision to Abort the Exchange in multiple error situations. See
D.5? and D.5 ??
     Too many corner cases
     Fear (reality?) of data integrity exposures
     Testing is bad enough for single error cases
     Questionable value

5.Added D.6a to show  another Exchange ambiguity case

6.Added text to qualify the length of time that context must be maintained
after FCP_RESP, to differentiate between Sequence level and Exchange level

7.Added that the use of REC to determine status for recovery in Class 2 is
optional in cases where it can apply.

Regards, Carl

Carl Zeitler
Compaq Computer Corporation
MS 150801, 20555 SH249, Houston, TX 77070
Phone:281-518-5258 Fax: 281-514-5270
E-Mail: Carl.Zeitler at compaq.com

-----Original Message-----
From: John Lohmeyer [mailto:lohmeyer at t10.org] 
Sent: Monday, April 24, 2000 10:48 AM
To: Zeitler, Carl
Subject: Re: Error Recovery Ladder Diagrams, FCP_2 Rev 4, for O-O-O


I've posted your document at:


John Lohmeyer                  Email: lohmeyer at t10.org
LSI Logic Corp.                Voice: +1-719-533-7560
4420 ArrowsWest Dr.              Fax: +1-719-533-7183
Colo Spgs, CO 80907
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