From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philip Molter Subject: Re: Force parity resync on raid5? Date: Thu, 12 Aug 2004 06:52:52 -0500 Sender: linux-raid-owner@vger.kernel.org Message-ID: <411B5A14.8070608@corp.texas.net> References: <200408120406.i7C46s309087@watkins-home.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200408120406.i7C46s309087@watkins-home.com> To: linux-raid@vger.kernel.org List-Id: linux-raid.ids > Recovering from a power failure does force a re-build (2.4), but from what I > remember the system looks like it is re-building a failed disk, which is not > what he wants to do. If the parity was good, re-building any 1 disk would > be fine. Actually, under a 2.4, the superblock is marked dirty and the parity is rebuilt. We've done this to over 100 systems (thank you, broken RedHat installer) and it's worked flawlessly. Neil, the new mdadm --update=resync works like a charm. The one thing I did notice is that when a drive fails out during the resync, the resync restarts on the remaining failed drives. As far as I can tell, that does what it's supposed to. Is that a nice little feature of the resync? Philip