From owner-freebsd-scsi@FreeBSD.ORG Mon Jun 28 18:33:20 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4A85A16A4CE for ; Mon, 28 Jun 2004 18:33:20 +0000 (GMT) Received: from spider.deepcore.dk (cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166]) by mx1.FreeBSD.org (Postfix) with ESMTP id 897C543D1D for ; Mon, 28 Jun 2004 18:33:19 +0000 (GMT) (envelope-from sos@DeepCore.dk) Received: from DeepCore.dk ([192.168.0.130]) by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id i5SIX8Vx040908; Mon, 28 Jun 2004 20:33:13 +0200 (CEST) (envelope-from sos@DeepCore.dk) Message-ID: <40E06465.9010706@DeepCore.dk> Date: Mon, 28 Jun 2004 20:33:09 +0200 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= User-Agent: Mozilla Thunderbird 0.5 (X11/20040329) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Doug Ambrisko References: <200406240201.i5O21H5g048428@ambrisko.com> In-Reply-To: <200406240201.i5O21H5g048428@ambrisko.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-mail-scanned: by DeepCore Virus & Spam killer v1.4 cc: freebsd-scsi@freebsd.org cc: Maxim Sobolev Subject: Re: HostRaid support on FreeBSD X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Jun 2004 18:33:20 -0000 Doug Ambrisko wrote: > Søren Schmidt writes: > | Reading the metadata off the disks and using that info to access a RAID > | array is easy and can be had even without docs in a few hours. Writing > | back the metadata in case of failures etc to retain sanity of the array > | is "somewhat" more difficult. Actually I'm working with this currently > | for new formats for ata-raid and its not trivial to get right. > > Of which we've done the Intel 2 drive format read, write deal with > broken mirrors etc. Writing and dealing with broke mirrors was harder > and can lead to breaking the Intel RAID BIOS code :-( > > It's available in our -stable ata SATA patches that have been updated to > 4.10-RELEASE. Cool, I'll take a look at that after I have the Adaptec format done, that would then bring us to 5 different supported formats, oh boy.... -- -Søren