From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 27 Jun 2001 12:23:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 27 Jun 2001 12:23:23 -0400 Received: from amadeus.resilience.com ([209.245.157.29]:42837 "HELO jmcmullan") by vger.kernel.org with SMTP id ; Wed, 27 Jun 2001 12:23:08 -0400 To: linux-kernel@vger.kernel.org Path: not-for-mail From: Jason McMullan Newsgroups: local.linux.kernel Subject: Re: multi-path IO in SCSI mid-layer Date: 27 Jun 2001 16:07:22 GMT Organization: Matrix Fire Systems Distribution: local Message-ID: <9hd0bq$unp$1@localhost.localdomain> In-Reply-To: <20010626110040.A28555@eng2.sequent.com> NNTP-Posting-Host: localhost.localdomain X-Trace: localhost.localdomain 993658042 31481 127.0.0.1 (27 Jun 2001 16:07:22 GMT) X-Complaints-To: news@localhost NNTP-Posting-Date: 27 Jun 2001 16:07:22 GMT Cc: patman@sequent.com User-Agent: tin/1.4.4-20000803 ("Vet for the Insane") (UNIX) (Linux/2.4.5 (i686)) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Patrick Mansfield wrote: > I'm interested in multi-path IO in the linux scsi mid-layer. > > Are there developers working on changes to the scsi layers/interfaces? > I've seen references about such work, but no details. > > [snip snip] > > But, a decent multi-path IO implementation requires significant changes > to the current linux scsi interfaces/structures - especially where no > functional interfaces exist, such as the direct references to Scsi_Device > host, and Scsi_Host host_queue. At Linuxcare I have written a multi-path system for Linux 2.2.x to support Sun's T3 hardware. It's pretty generic, though. (A user in Europe has reported success with the IBM Shark SAN with our SCSI Alias Chains failover system). For source code, please see: http://open-projects.linuxcare.com/t3/ Please contact me by email if you're interested in a version for 2.4.x. -- Jason McMullan, Senior Linux Consultant Linuxcare, Inc. 412.432.6457 tel, 412.656.3519 cell jmcmullan@linuxcare.com, http://www.linuxcare.com/ Linuxcare. Putting open source to work.