From owner-freebsd-hackers@FreeBSD.ORG Wed Nov 26 01:33:23 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B3AE91065672 for ; Wed, 26 Nov 2008 01:33:23 +0000 (UTC) (envelope-from lists@rhavenn.net) Received: from smtp205.sat.emailsrvr.com (smtp205.sat.emailsrvr.com [66.216.121.205]) by mx1.freebsd.org (Postfix) with ESMTP id 930C98FC16 for ; Wed, 26 Nov 2008 01:33:23 +0000 (UTC) (envelope-from lists@rhavenn.net) Received: from relay10.relay.sat.mlsrvr.com (localhost [127.0.0.1]) by relay10.relay.sat.mlsrvr.com (SMTP Server) with ESMTP id 4284A1E0E71 for ; Tue, 25 Nov 2008 20:09:25 -0500 (EST) Received: by relay10.relay.sat.mlsrvr.com (Authenticated sender: rhavenn-AT-rhavenn.net) with ESMTP id C01AC1E0E61 for ; Tue, 25 Nov 2008 20:09:24 -0500 (EST) Received: by alucard.int.rhavenn.net (Postfix, from userid 1001) id EFE6F3F42D; Tue, 25 Nov 2008 16:09:14 -0900 (AKST) Date: Tue, 25 Nov 2008 16:09:14 -0900 From: Henrik Hudson To: freebsd-hackers@freebsd.org Message-ID: <20081126010914.GA30629@alucard.int.rhavenn.net> References: <2ACA3DE8F9758A48B8BE2C7A847F91F240CD5E@polaris.maxiscale.com> <200811250929.37929.fjwcash@gmail.com> <2ACA3DE8F9758A48B8BE2C7A847F91F240CD9D@polaris.maxiscale.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2ACA3DE8F9758A48B8BE2C7A847F91F240CD9D@polaris.maxiscale.com> User-Agent: Mutt/1.5.18 (2008-05-17) Subject: Re: Hot swapping SATA drives X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Nov 2008 01:33:23 -0000 On Tue, 25 Nov 2008, Peter Steele wrote: > >Use a real hot-swappable drive plane, attached to a good SATA > controller > >that handles hot-swap in hardware? :) > > > >Use ZFS, which seems to work better with drives being added/removed > than > >ata(4)? :) > > > >Sorry, the few systems we have running FreeBSD either have single IDE > >drives, single SATA drives, or 12-24 SATA drives attached to a hardware > > >hot-swappable drive-plane connected to 3Ware 9550/9650 RAID > controllers. > >The single-drive systems obviously can't do swapping, and the rest work > > >without issues. > > I should further clarified that we are running 4-drive systems, with > drive sizes ranging from 250GB-1TB. These drives are not in a RAID > cluster and we do not want them to be. We do need the drives to be hot > swappable though. I'll contact 3Ware and go from there. I would think that if you're using a 3ware controller in JBOD and as stated are in AHCI mode that as long as the OS umounts the drive that you should be able to hot-swap. However, checking with 3ware is probably the best option :) Henrik -- Henrik Hudson lists@rhavenn.net