From owner-freebsd-stable@FreeBSD.ORG Mon Sep 29 14:47:32 2008 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 9BCCB1065690 for ; Mon, 29 Sep 2008 14:47:32 +0000 (UTC) (envelope-from gavin@FreeBSD.org) Received: from mail-gw1.york.ac.uk (mail-gw1.york.ac.uk [144.32.128.246]) by mx1.freebsd.org (Postfix) with ESMTP id 0D7B48FC1F for ; Mon, 29 Sep 2008 14:47:31 +0000 (UTC) (envelope-from gavin@FreeBSD.org) Received: from mail-gw6.york.ac.uk (mail-gw6.york.ac.uk [144.32.129.26]) by mail-gw1.york.ac.uk (8.13.6/8.13.6) with ESMTP id m8TElOkU005408; Mon, 29 Sep 2008 15:47:24 +0100 (BST) Received: from buffy-128.york.ac.uk ([144.32.128.160] helo=buffy.york.ac.uk) by mail-gw6.york.ac.uk with esmtps (TLSv1:AES256-SHA:256) (Exim 4.68) (envelope-from ) id 1KkK20-0004Yz-1Q; Mon, 29 Sep 2008 15:47:24 +0100 Received: from buffy.york.ac.uk (localhost [127.0.0.1]) by buffy.york.ac.uk (8.14.2/8.14.2) with ESMTP id m8TElNJ0025986; Mon, 29 Sep 2008 15:47:23 +0100 (BST) (envelope-from gavin@FreeBSD.org) Received: (from ga9@localhost) by buffy.york.ac.uk (8.14.2/8.14.2/Submit) id m8TElMPL025985; Mon, 29 Sep 2008 15:47:22 +0100 (BST) (envelope-from gavin@FreeBSD.org) X-Authentication-Warning: buffy.york.ac.uk: ga9 set sender to gavin@FreeBSD.org using -f From: Gavin Atkinson To: Miroslav Lachman <000.fbsd@quip.cz> In-Reply-To: <48E0DB7E.20804@quip.cz> References: <20080921213426.GA13923@0lsen.net> <20080921215203.GC9494@icarus.home.lan> <20080921215930.GA25826@0lsen.net> <20080921220720.GA9847@icarus.home.lan> <249873145.20080926213341@takeda.tk> <20080927051413.GA42700@icarus.home.lan> <765067435.20080926223557@takeda.tk> <20080927064417.GA43638@icarus.home.lan> <20080927202250.GA60980@icarus.home.lan> <48E0DB7E.20804@quip.cz> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Mon, 29 Sep 2008 15:47:22 +0100 Message-Id: <1222699642.24339.12.camel@buffy.york.ac.uk> Mime-Version: 1.0 X-Mailer: Evolution 2.22.2 FreeBSD GNOME Team Port X-York-MailScanner: Found to be clean X-York-MailScanner-From: gavin@freebsd.org Cc: Charles Sprickman , Jeremy Chadwick , freebsd-stable@FreeBSD.org Subject: Re: Recommendations for servers running SATA drives 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: Mon, 29 Sep 2008 14:47:32 -0000 On Mon, 2008-09-29 at 15:43 +0200, Miroslav Lachman wrote: > Jeremy Chadwick wrote: > > > On Sat, Sep 27, 2008 at 03:16:11PM -0400, Charles Sprickman wrote: > > > > I've successfully done a hot-swap (hardware: SATA hot-swap backplane, > > AHCI in use, SATA2 disks), but it required me to issue "atacontrol > > detach" first (I am very curious to know what would've happened had I > > just yanked the disk). Upon inserting the new disk, one has to be > > *very* careful about the order of atacontrol commands given -- there > > are cases where "attach" will cause the system to panic or SATA bus to > > lock up, but it seems to depend upon what commands were executed > > previously (such as "reinit"). > > > > Sorry if this is off-topic, but I wanted to mention it. > > Hot-swapping is totally upredictable on FreeBSD (from my experiences). I > tried it many times on Asus 1U servers and on Sun Fire X2100 / X2100 M2 > with FreeBSD 6.2 and 7.0 (both i386). I can't speak for the Dell, but I can at least say that at least on the X2100, not even Solaris supports either hot-swapping or the built in software RAID. When they were first released the advertising said that they had these, but those claims was quietly removed from the website some weeks after release. Short answer: give up on hot-swap the X2100. As for the X2100 M2, that is supposed to support it, and I believe it works fine for us under Solaris. I'm not sure if I've got any spare M2's here, if so I'll have a play. Gavin