Return-Path: X-Sieve: cmu-sieve 2.0 Return-Path: Received: (from majordom@localhost) by ece.cmu.edu (8.11.0/8.10.2) id h25E7c121754 for ips-outgoing; Wed, 5 Mar 2003 09:07:38 -0500 (EST) X-Authentication-Warning: ece.cmu.edu: majordom set sender to owner-ips@ece.cmu.edu using -f Received: from fep2.012.net.il (fep2.goldenlines.net.il [212.117.129.202]) by ece.cmu.edu (8.11.0/8.10.2) with ESMTP id h25E7YM21749 for ; Wed, 5 Mar 2003 09:07:34 -0500 (EST) Received: from JA31 ([12.65.150.199]) by fep2.012.net.il with ESMTP id <20030305140726.RCGM11908.fep2@JA31>; Wed, 5 Mar 2003 16:07:26 +0200 From: "Julian Satran" To: , Cc: , Subject: RE: Error recovery level 2 Question Date: Wed, 5 Mar 2003 16:07:20 +0200 Message-ID: <000c01c2e320$8d710c50$c796410c@JA31> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-Reply-To: <1BEBA5E8600DD4119A50009027AF54A010FAE103@axcs04.cos.agilent.com> Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by ece.cmu.edu id h25E7ZM21750 Sender: owner-ips@ece.cmu.edu Precedence: bulk sorry for the delay - I was away from my desk. The target will have to send a recovery R2T based on what it has (part or all of the data).. An overzealous initiator may start sending data right away - but it should keep track of the changes in PDU size in any and the rules associated with it. Julo kevin_lemay@agilent.com 05/03/03 01:14 To Julian Satran/Haifa/IBM@IBMIL cc ips@ece.cmu.edu Subject Error recovery level 2 Question Julian, Assume that I have a multi-connection session to a target when one of the connections fails. What is the completion of the following diagram (assume 8K PDUs and maxBurst = 64K): Initiator Target ---------- --------- Write Cmd (64K no Immediate) ---> <--- R2T Offset 0, len=64K Data PDU (8K DataSN 0) ---> Data PDU (8K DataSN 1) ---> --- Connection Lost --- On 2nd connection: Logout (for recovery) ---> <--- Logout Response Task Mgnt (Reassign) ---> <--- Task Mgnt Response - OK What Comes Next? Is a recovery R2T expected from the target? or does the Initiator continue to send data PDUs to the target? If the initiator continues to send, what is the proper place to continue. I may have submitted several PDUs to the stack that were never received before the connection loss was detected. The read request seems fairly straight forward, but the write case is not clear (at least to me...) Thanks for any help, Kevin Lemay Regards, Julo -----Original Message----- From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu] On Behalf Of kevin_lemay@agilent.com Sent: 05 March, 2003 01:14 To: Julian_Satran@il.ibm.com Cc: ips@ece.cmu.edu Subject: Error recovery level 2 Question Julian, Assume that I have a multi-connection session to a target when one of the connections fails. What is the completion of the following diagram (assume 8K PDUs and maxBurst = 64K): Initiator Target ---------- --------- Write Cmd (64K no Immediate) ---> <--- R2T Offset 0, len=64K Data PDU (8K DataSN 0) ---> Data PDU (8K DataSN 1) ---> --- Connection Lost --- On 2nd connection: Logout (for recovery) ---> <--- Logout Response Task Mgnt (Reassign) ---> <--- Task Mgnt Response - OK What Comes Next? Is a recovery R2T expected from the target? or does the Initiator continue to send data PDUs to the target? If the initiator continues to send, what is the proper place to continue. I may have submitted several PDUs to the stack that were never received before the connection loss was detected. The read request seems fairly straight forward, but the write case is not clear (at least to me...) Thanks for any help, Kevin Lemay