From owner-freebsd-stable@FreeBSD.ORG Tue Feb 9 16:18:22 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 20ADE1065672 for ; Tue, 9 Feb 2010 16:18:22 +0000 (UTC) (envelope-from peter@simons-rock.edu) Received: from hedwig.simons-rock.edu (hedwig.simons-rock.edu [208.81.88.14]) by mx1.freebsd.org (Postfix) with ESMTP id DB59B8FC1F for ; Tue, 9 Feb 2010 16:18:21 +0000 (UTC) Received: from cesium.hyperfine.info (c2.8d.5646.static.theplanet.com [70.86.141.194]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by hedwig.simons-rock.edu (Postfix) with ESMTP id A3BFC2BB341; Tue, 9 Feb 2010 11:18:20 -0500 (EST) Date: Tue, 9 Feb 2010 11:18:19 -0500 From: "Peter C. Lai" To: Dan Langille Message-ID: <20100209161817.GI4648@cesium.hyperfine.info> References: <4B6F9A8D.4050907@langille.org> <4B71490B.6030602@langille.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B71490B.6030602@langille.org> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Charles Sprickman , FreeBSD Stable Subject: Re: hardware for home use large storage 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, 09 Feb 2010 16:18:22 -0000 On 2010-02-09 06:37:47AM -0500, Dan Langille wrote: > Charles Sprickman wrote: >> On Mon, 8 Feb 2010, Dan Langille wrote: > > Also, it seems like >> people who use zfs (or gmirror + gstripe) generally end up buying pricey >> hardware raid cards for compatibility reasons. There seem to be no decent >> add-on SATA cards that play nice with FreeBSD other than that weird >> supermicro card that has to be physically hacked about to fit. Mostly only because certain cards have issues w/shoddy JBOD implementation. Some cards (most notably ones like Adaptec 2610A which was rebranded by Dell as the "CERC SATA 1.5/6ch" back in the day) won't let you run the drives in passthrough mode and seem to all want to stick their grubby little RAID paws into your JBOD setup (i.e. the only way to have minimal participation from the "hardware" RAID is to set each disk as its own RAID-0/volume in the controller BIOS) which then cascades into issues with SMART, AHCI, "triple caching"/write reordering, etc on the FreeBSD side (the controller's own craptastic cache, ZFS vdev cache, vmm/app cache, oh my!). So *some* people go with something tried-and-true (basically bordering on server-level cards that let you ditch any BIOS type of RAID config and present the raw disk devices to the kernel). > > They use software RAID and hardware RAID at the same time? I'm not sure > what you mean by this. Compatibility with FreeBSD? > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" -- =========================================================== Peter C. Lai | Bard College at Simon's Rock Systems Administrator | 84 Alford Rd. Information Technology Svcs. | Gt. Barrington, MA 01230 USA peter AT simons-rock.edu | (413) 528-7428 ===========================================================