From owner-freebsd-stable@FreeBSD.ORG Tue Dec 13 22:23:44 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AA2EE16A41F for ; Tue, 13 Dec 2005 22:23:44 +0000 (GMT) (envelope-from torfinn.ingolfsen@broadpark.no) Received: from osl1smout1.broadpark.no (osl1smout1.broadpark.no [80.202.4.58]) by mx1.FreeBSD.org (Postfix) with ESMTP id F2E5C43D4C for ; Tue, 13 Dec 2005 22:23:43 +0000 (GMT) (envelope-from torfinn.ingolfsen@broadpark.no) Received: from osl1sminn1.broadpark.no ([80.202.4.59]) by osl1smout1.broadpark.no (Sun Java System Messaging Server 6.1 HotFix 0.05 (built Oct 21 2004)) with ESMTP id <0IRG00LO1JQVIZ80@osl1smout1.broadpark.no> for freebsd-stable@freebsd.org; Tue, 13 Dec 2005 23:28:07 +0100 (CET) Received: from kg-work.kg4.no ([80.203.92.30]) by osl1sminn1.broadpark.no (Sun Java System Messaging Server 6.1 HotFix 0.05 (built Oct 21 2004)) with SMTP id <0IRG00M6OJO1PD90@osl1sminn1.broadpark.no> for freebsd-stable@freebsd.org; Tue, 13 Dec 2005 23:26:25 +0100 (CET) Date: Tue, 13 Dec 2005 21:37:04 +0100 From: Torfinn Ingolfsen X-Face: "t9w2,-X@O^I`jVW\sonI3.,36KBLZE*AL[y9lL[PyFD*r_S:dIL9c[8Y>V42R0"!"yb_zN,f#%.[PYYNq; m"_0v; ~rUM2Yy!zmkh)3&U|u!=T(zyv,MHJv"nDH>OJ`t(@mil461d_B'Uo|'nMwlKe0Mv=kvV?Nh@>Hb<3s_z2jYgZhPb@?Wi^x1a~Hplz1.zH In-reply-to: <200512131651.jBDGp2Lx029496@lurza.secnetix.de> To: freebsd-stable@freebsd.org Message-id: <20051213213704.7b4fb83a.torfinn.ingolfsen@broadpark.no> MIME-version: 1.0 X-Mailer: Sylpheed version 1.0.6 (GTK+ 1.2.10; i386-portbld-freebsd5.4) Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT References: <20051208001857.68ac4fef.torfinn.ingolfsen@broadpark.no> <200512131651.jBDGp2Lx029496@lurza.secnetix.de> Subject: Re: FreeBSD 6.0 as storage server with raid5? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Dec 2005 22:23:44 -0000 On Tue, 13 Dec 2005 17:51:02 +0100 (CET) Oliver Fromme wrote: > There's no reason why you shouldn't be able to do that. Noted. Good to know. :-) > Note that the HPT 18x0A have an onboard processor which > does the XOR (parity) calculations for RAID-5. For the > non-A versions, the host CPU has to do those calculations > (in the driver), which can be quite a noticable burden. Noted, this is valuable information, thanks! I found a test: http://www6.tomshardware.com/storage/20040625/sata-raid-04.html and this test confirms that the RocketRAID 1640 is software raid only. > Some controllers have a setting to enable staged starting > of the drives, i.e. one after the other. This can reduce > the maximum PSU requirement considerably if you have a > lot of disks. Noted, I'll look out for this. > PS: I assume you already know this, but I'd like to note > this for all readers: RAID (of any kind) does not replace > reliable backups. Always make proper backups, independent > of your RAID (if any). I agree 100%, and this cannot be told to often. In my case, the backup server will probably be another FreeBSD box with external firewire drives, to keep costs down. -- Regards, Torfinn Ingolfsen, Norway