From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wols Lists Subject: Re: Raid6 recovery Date: Sun, 22 Mar 2020 00:05:06 +0000 Message-ID: <5E76ABB2.9010506@youngman.org.uk> References: <5E75163B.2050602@youngman.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Phil Turmel , Glenn Greibesland Cc: linux-raid@vger.kernel.org, NeilBrown List-Id: linux-raid.ids On 21/03/20 19:24, Phil Turmel wrote: > If UREs do break your array again, you will need to use an > error-ignoring copy tool (some flavor of ddrescue) to put the readable > data onto a new device, remove the old device from the system, and then > --assemble --force with the replacement. Repeat as needed. I would NOT recommend it at the moment - it's untested and reputedly breaks raids 5 & 6, but look at dm-integrity. If we could trust it, it would be a wonderful tool with ddrescue. Hopefully I'm about to have a wonderful system with 6 or so drives I can play with as a raid test-bed, and I'm hoping to do a load of work on this. Cheers, Wol