From owner-freebsd-questions@freebsd.org Wed May 11 18:53:34 2016 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5E486B3756B for ; Wed, 11 May 2016 18:53:34 +0000 (UTC) (envelope-from allan@physics.umn.edu) Received: from mail.physics.umn.edu (smtp.spa.umn.edu [128.101.220.4]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3EBD6110D for ; Wed, 11 May 2016 18:53:33 +0000 (UTC) (envelope-from allan@physics.umn.edu) Received: from spa-sysadm-01.spa.umn.edu ([134.84.199.8]) by mail.physics.umn.edu with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.77 (FreeBSD)) (envelope-from ) id 1b0Yjs-0003jb-IJ for freebsd-questions@freebsd.org; Wed, 11 May 2016 13:20:04 -0500 Subject: Re: FreeBSD-10.3 root ZFS redux To: freebsd-questions@freebsd.org References: <0409d2208ccce8e2f9e0ce6526bf6756.squirrel@webmail.harte-lyne.ca> <5845c9cfc3bed4171df9b4b386573782.squirrel@webmail.harte-lyne.ca> From: Graham Allan Message-ID: <573377D4.7080909@physics.umn.edu> Date: Wed, 11 May 2016 13:20:04 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: <5845c9cfc3bed4171df9b4b386573782.squirrel@webmail.harte-lyne.ca> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 May 2016 18:53:34 -0000 On 5/11/2016 1:13 PM, James B. Byrne wrote: > > I managed to get this reversed in my head as I composed. The question > is what happens when a nominally 3TB HDD is put in that has fewer > accessible sectors than a similar 3TB drive already present? My understanding is that it would just be rejected (I see some older solaris examples mention a "device too small" error). Best practice is probably to create a gpt partition of some standard size on the drives before adding that to the pool, to give a little adjustment room, though I confess I have made all my pools to date using the raw drives (other than a geom label); and simply try to replace drives with the same model. Graham -- ------------------------------------------------------------------------- Graham Allan School of Physics and Astronomy - University of Minnesota -------------------------------------------------------------------------