From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Zhang Subject: Re: how to clone a disk Date: Sat, 11 Mar 2006 18:10:31 -0500 Message-ID: <1142118632.27020.13.camel@localhost.localdomain> References: <1142038562.20484.234.camel@localhost.localdomain> <4413011F.30709@h3c.com> <1142114991.27020.9.camel@localhost.localdomain> <44135877.2000207@h3c.com> Reply-To: mingz@ele.uri.edu Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <44135877.2000207@h3c.com> Sender: linux-raid-owner@vger.kernel.org To: Mike Hardy Cc: PFC , "Paul M." , linux-raid@vger.kernel.org List-Id: linux-raid.ids thanks a lot! ming On Sat, 2006-03-11 at 15:08 -0800, Mike Hardy wrote: > > > Ming Zhang wrote: > > On Sat, 2006-03-11 at 08:55 -0800, Mike Hardy wrote: > > > >>I can think of two things I'd do slightly differently... > >> > >>Do a smartctl -t long on each disk before you do anything, to verify > >>that you don't have single sector errors on other drives > > > > > > will this test interfere with normal disk io activity? > > If I understand the documentation correctly, it is not supposed to > interfere with normal I/O. It's something the disk does when it can. > > Also, I do it on running systems with busy disks all the time (it's > scheduled, actually, and runs automatically at the same time backups and > things like that happen), and it is never noticable to me. > > *except* when it finds something, and it tells me there's a problem > before any software notices. I love the advance warning... > > -Mike