From owner-freebsd-fs@FreeBSD.ORG Wed May 2 21:18:23 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 B88001065672 for ; Wed, 2 May 2012 21:18:23 +0000 (UTC) (envelope-from rincebrain@gmail.com) Received: from mail-vx0-f182.google.com (mail-vx0-f182.google.com [209.85.220.182]) by mx1.freebsd.org (Postfix) with ESMTP id 6B8E48FC14 for ; Wed, 2 May 2012 21:18:23 +0000 (UTC) Received: by vcmm1 with SMTP id m1so1070271vcm.13 for ; Wed, 02 May 2012 14:18:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=h+cWEsm1/ONIvLxmx/NVepeqII38IZAkvDIbAufrTug=; b=Koeq3yiWjRDMDTILja4uJlTyO7UQ9jvZtS82hlyhGHdFH3t7uISvBpCYbQkENgOKFF VCg7BmDveEhgt/tCkGaFdD6gT7ufBQdpiZ7YYM5YwksFEHZtkbfQqD5s+GczNF83q0Z+ +fEukNYoAyq+ClAdoyl7olEL0Tc2nBsLVt13cMHD5rXQLA6L/nZ3QktnIwagmf8dFDt0 +OFJC3Jsuw3gLU9gyOi+tHnNqkDptSSp61ycJcPRx72l1FBXT6ixLgYcJQpey8F/HUKV EE8+A7gQXuRqC1rnZOiwcAl2jo9SfzZr8Z1OFo6m6/D0dUA7FyQ9qCqHk2H+gTa8BCbj ZUWg== MIME-Version: 1.0 Received: by 10.52.172.172 with SMTP id bd12mr772620vdc.69.1335993502850; Wed, 02 May 2012 14:18:22 -0700 (PDT) Sender: rincebrain@gmail.com Received: by 10.220.117.81 with HTTP; Wed, 2 May 2012 14:18:22 -0700 (PDT) In-Reply-To: References: <20120501210429.D4F6910657EB@hub.freebsd.org> Date: Wed, 2 May 2012 17:18:22 -0400 X-Google-Sender-Auth: a7oCXPQyHam6v9bWoe4oLYEK77s Message-ID: From: Rich To: Mark Felder Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-fs@freebsd.org Subject: Re: Replacing dead drives in ZRAID2 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 May 2012 21:18:23 -0000 It's perfectly possible to do a 3-way RAID-Z2 - just not useful, AFAIK. Also, Simon, I think the disconnect between you and the mailing list is that you are observing bad behavior of the system when you remove the drives, and you think this is a ZFS problem. This is not a ZFS problem - if the underlying storage driver (ahd) freezes up and stops handling requests (which is what it sounds like you're describing here), there's not much ZFS can do about it. - Rich On Wed, May 2, 2012 at 5:05 PM, Mark Felder wrote: > First of all, you're testing on decade old SCSI hardware that probably > hasn't seen any serious use on a newer FreeBSD install in a very, very long > time. > > Secondly, I'm confused about the concept of a "3 drive RAIDZ2". How is that > even possible? Two drives have to be parity, so the last drive is... the > entire dataset? Why aren't you just doing a 3-way mirror? > > And finally yes, you can just yank drives in a ZFS array to simulate a > failure. After reinsertion you have to manually add them back to the pool, > but it certainly works. > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"