From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.54) id 1F7ePG-00012z-O9 for garchives@archives.gentoo.org; Fri, 10 Feb 2006 19:58:15 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.5/8.13.5) with SMTP id k1AJvFP9023675; Fri, 10 Feb 2006 19:57:15 GMT Received: from ender.volumehost.net (adsl-69-154-123-202.dsl.fyvlar.swbell.net [69.154.123.202]) by robin.gentoo.org (8.13.5/8.13.5) with ESMTP id k1AJqulI031323 for <gentoo-user@lists.gentoo.org>; Fri, 10 Feb 2006 19:52:57 GMT Received: from localhost (localhost [127.0.0.1]) by ender.volumehost.net (Postfix) with ESMTP id BF0728241 for <gentoo-user@lists.gentoo.org>; Fri, 10 Feb 2006 19:52:55 +0000 (UTC) Received: from ender.volumehost.net ([127.0.0.1]) by localhost (ender.volumehost.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 26122-05 for <gentoo-user@lists.gentoo.org>; Fri, 10 Feb 2006 19:52:53 +0000 (UTC) Received: from [192.168.1.2] (ip70-178-175-2.ks.ks.cox.net [70.178.175.2]) (using SSLv3 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ender.volumehost.net (Postfix) with ESMTP id BBD558243 for <gentoo-user@lists.gentoo.org>; Fri, 10 Feb 2006 19:52:53 +0000 (UTC) From: "Boyd Stephen Smith Jr." <bss03@volumehost.com> To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] [OT] 3ware SATA Raid Date: Fri, 10 Feb 2006 13:34:00 -0600 User-Agent: KMail/1.9.1 References: <200602101014.59627.shrdlu@unlimitedmail.org> <200602101939.46980.Rick.van.Hattem@fawo.nl> In-Reply-To: <200602101939.46980.Rick.van.Hattem@fawo.nl> Precedence: bulk List-Post: <mailto:gentoo-user@lists.gentoo.org> List-Help: <mailto:gentoo-user+help@gentoo.org> List-Unsubscribe: <mailto:gentoo-user+unsubscribe@gentoo.org> List-Subscribe: <mailto:gentoo-user+subscribe@gentoo.org> List-Id: Gentoo Linux mail <gentoo-user.gentoo.org> X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200602101334.00917.bss03@volumehost.com> X-Virus-Scanned: amavisd-new at volumehost.net X-Archives-Salt: da2b7439-cfdf-440f-bedf-70dc68e20f3f X-Archives-Hash: 3a32350ce386ad9c7b095a3a62141c59 On Friday 10 February 2006 12:39, Rick van Hattem <Rick.van.Hattem@fawo.nl> wrote about 'Re: [gentoo-user] [OT] 3ware SATA Raid': > On Friday 10 February 2006 10:14, Etaoin Shrdlu wrote: > > So, I'm finally going to buy a 3ware 9550sx SATA Raid board. > > > > From what I've read, it is well supported by linux and it should do > > true hardware raid (ie, the OS sees only one drive). Anyway, I found > > little documentation about the so-called hot-swap feature. > > As I understand it, that means one should be able to remove a faulty > > disk from the array, and subsequently insert a new disk, all without > > powering off the machine, and with the OS being unaware of what's > > going on. Is my understanding correct or am I too optimistic? > > You are correct, you are able to hot-swap the drives without rebooting > or anything. > > But...... Areca cards are a lot faster for the serial ata stuff, altough > I'm not sure about there linux driver support, it's worth to take a look > at there stuff :) They have supported drivers (GPL'd, IIRC) that go back to 2.3.x kernels. 2.6.16 might include them in mainline, mm-sources has included them since 2.6.14, at least. I think RHEL4 will include the drivers in their kernel. They also provide 32- and 64-bit command line utilities that can do all the controller operations from within linux, as well as both 32- and 64-bit http servers that will run on the machine with the controller and provide a remote (or local) management console that provides all the controller operations. If you want to integrate the controller management into a larger tool, or write a gtk/qt frontend, they publish the public API provided by their closed source, but freely available arecalib. Areca cards do handle the hot-swap feature mentioned by the OP. Unfortunately (and from what I've read this is a limitation of linux...), newly created arrays or pass-though drives do not immediately appear in /dev nor do removed arrays or pass-through drives disappear. That said, the scenario given by the OP (replacing a faulty disk live) does not add or remove device node in /dev so it will work perfectly. I love my Areca 1160. There's only one feature I wish it handled that it doesn't: the non-standard RAID 1n, which is RAID 1 (mirroring) with more than 2 drives in the array -- something that should've been trivial for them to implement. So, instead I use RAID 6, which is fairly nice. -- Boyd Stephen Smith Jr. bss03@volumehost.com ICQ: 514984 YM/AIM: DaTwinkDaddy -- gentoo-user@gentoo.org mailing list