From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lennert Buytenhek Subject: Re: raid6 rebuild Date: Thu, 5 Apr 2007 16:06:27 +0200 Message-ID: <20070405140626.GA8726@xi.wantstofly.org> References: <20070404194638.GB3712@xi.wantstofly.org> <20070405055030.GA6978@xi.wantstofly.org> <4614FF86.3020007@tmr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <4614FF86.3020007@tmr.com> Sender: linux-raid-owner@vger.kernel.org To: Bill Davidsen Cc: Dan Williams , mingo@redhat.com, neilb@suse.de, linux-raid@vger.kernel.org List-Id: linux-raid.ids On Thu, Apr 05, 2007 at 09:54:14AM -0400, Bill Davidsen wrote: > I confess, I would feel safer with my data if the rebuild started > over, I would like to be sure that when it (finally) finishes the > data are valid. With disk #3 about to die, I'd have felt safer if it first finished rebuilding the replacement disk for failed disk #1 (that rebuild had almost completed at that point), safeguarding the array against a third disk failure. Yeah, I know, you're not supposed to lose three disks within one day. > If you replaced the 2nd drive, then a full rebuild would be required > in any case, to get ALL drives valid. You could finish the last little bit of the resync of the replacement for failed disk #1 (by looking at P+Q), and then re-sync the replacement for failed disk #2 (by looking only at P..)