From owner-freebsd-fs@FreeBSD.ORG Tue Nov 13 17:05:13 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 358D5F3 for ; Tue, 13 Nov 2012 17:05:13 +0000 (UTC) (envelope-from yanegomi@gmail.com) Received: from mail-da0-f54.google.com (mail-da0-f54.google.com [209.85.210.54]) by mx1.freebsd.org (Postfix) with ESMTP id F3BCE8FC14 for ; Tue, 13 Nov 2012 17:05:12 +0000 (UTC) Received: by mail-da0-f54.google.com with SMTP id z9so3432868dad.13 for ; Tue, 13 Nov 2012 09:05:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=references:mime-version:in-reply-to:content-type :content-transfer-encoding:message-id:cc:x-mailer:from:subject:date :to; bh=b06UWXUwJyNt/IPyMebL6OnaTro7nQCvb67y2UJ1vWc=; b=ggfIx80d7opd/iK4e1AQrLqtMpLuedSlFkxWpt6f3IdRr1dQvjTEV+awj5XBEE2WFk L+KM2EE/3zQhk3OwPKZ2cAEj1O9sxHp0M7YUdivSXXjuYdZe6phpmW/ARGXOQTNu/1te xjHcQk61IYexdcBdWBKg8XluA/IhMKeKaH+2KMY6N+AorIc4wGkr7utUf2fTJ8kUWKti 0cXWyB/jYT1oO9GZYPWB0PIKAdehoiQx1DVuoaUxZe8kl49/48biQwQGx4hmKhdvb1oo Vwvu/WoaLX5RZzu0frSc8Y1tN9EcrxCavzfZfjh9o+Y1vlk3ttKWgkHFPe62EqGQldQB dFHQ== Received: by 10.68.236.131 with SMTP id uu3mr69169412pbc.104.1352826311604; Tue, 13 Nov 2012 09:05:11 -0800 (PST) Received: from [10.143.141.46] (mobile-166-147-093-219.mycingular.net. [166.147.93.219]) by mx.google.com with ESMTPS id qp6sm6224355pbc.25.2012.11.13.09.04.58 (version=SSLv3 cipher=OTHER); Tue, 13 Nov 2012 09:05:09 -0800 (PST) References: <50A130B7.4080604@cse.yorku.ca> <20121113043409.GA70601@neutralgood.org> <50A266DA.2090605@cse.yorku.ca> <50A26DC6.1050205@quip.cz> Mime-Version: 1.0 (1.0) In-Reply-To: <50A26DC6.1050205@quip.cz> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message-Id: X-Mailer: iPhone Mail (10A523) From: Garrett Cooper Subject: Re: RHEL to FreeBSD file server Date: Tue, 13 Nov 2012 09:04:54 -0800 To: Miroslav Lachman <000.fbsd@quip.cz> Cc: "freebsd-fs@freebsd.org" X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Nov 2012 17:05:13 -0000 On Nov 13, 2012, at 7:56 AM, Miroslav Lachman <000.fbsd@quip.cz> wrote: > Jason Keltz wrote: > [...] >=20 >> Presently, with the mirrors, I'm using 22 disks with leaving 2 hot spares= . >> If I used 6 x 4 disk vdevs, I use all the disks and don't have hot >> spares (though I have better redundancy) -- I could put spares into the >> R720 head which actually has 14 disk slots empty, but I'm hesitant to >> put a spare for the md1220 using a different driver in the head of the >> R720... >=20 > Beware of hot spares - they are not "hot". >=20 > kern/134491: [zfs] Hot spares are rather cold... > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D134491 >=20 > This is long standing unsolved issue. You can add drives as "hot spares" t= o the zpool, but FreeBSD lacks daemon to recieve notifications about disk fa= ilure and failed drive will not be replaced by spare. You should be able to work around this on 9.1 with a zfs scrub once the driv= e has been pulled from the chassis, but I recommend testing this out first, j= ust to be safe. Cheers, -Garrett=