From owner-freebsd-current Sat Jan 31 16:58:52 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA12880 for current-outgoing; Sat, 31 Jan 1998 16:58:52 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from smtp04.primenet.com (smtp04.primenet.com [206.165.6.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA12872 for ; Sat, 31 Jan 1998 16:58:47 -0800 (PST) (envelope-from tlambert@usr06.primenet.com) Received: (from daemon@localhost) by smtp04.primenet.com (8.8.8/8.8.8) id RAA10758; Sat, 31 Jan 1998 17:58:38 -0700 (MST) Received: from usr06.primenet.com(206.165.6.206) via SMTP by smtp04.primenet.com, id smtpd010732; Sat Jan 31 17:58:34 1998 Received: (from tlambert@localhost) by usr06.primenet.com (8.8.5/8.8.5) id RAA19438; Sat, 31 Jan 1998 17:58:31 -0700 (MST) From: Terry Lambert Message-Id: <199802010058.RAA19438@usr06.primenet.com> Subject: Re: RAID controllers - folks, check this thing out To: totii@est.is (Thordur Ivarsson) Date: Sun, 1 Feb 1998 00:58:31 +0000 (GMT) Cc: taob@nbc.netcom.ca, karl@mcs.net, current@FreeBSD.ORG In-Reply-To: <34D3BD21.D2E76C22@est.is> from "Thordur Ivarsson" at Feb 1, 98 00:09:05 am X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG X-To-Unsubscribe: mail to majordomo@FreeBSD.org "unsubscribe current" > You should read the RAIDframe papers at > http://auchentoshan.pdl.cs.cmu.edu/RAIDframe/ > the algorithm makes the difference in small writes, the small write has > to be broken up into smaller units to spread to 'stripe width' of disks, > or append to already written data on disk therefore 'read - append - > write' sequence in stead of just 'write'. > > At least is this what I got out of those papers and what I have been > told of RAID specialists. For what it's worth: I submitted the patches to RAIDframe for FreeBSD to the -current list; they should be in the archives. I also sent them back for inclusion in the next release; they were acknowledged, and they are supposed to be included. I'm not sure if they've been integrated in the code you can currently download yet, or not. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.