From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Subject: Re: MD RAID6 corrupted by Avago 9260-4i controller [SOLVED] Date: Tue, 17 May 2016 20:42:02 +0200 Message-ID: <20160517184202.7D19C10035C@atlas.denx.de> References: <20160515133740.85EC3100879@atlas.denx.de> <20160515153121.GA11365@EIS.leimen.priv> <20160515182524.7B12D100A8E@atlas.denx.de> <20160515183128.GA12823@EIS.leimen.priv> <20160515193516.2C457100879@atlas.denx.de> <20160515203446.GA13218@EIS.leimen.priv> <20160515231046.E3685100A8E@atlas.denx.de> <20160516083903.GA29380@EIS.leimen.priv> <20160516120600.5428910035C@atlas.denx.de> <20160516125801.20A1A100879@atlas.denx.de> <20160516131439.GA2850@metamorpher.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: In-reply-to: <20160516131439.GA2850@metamorpher.de> Sender: linux-raid-owner@vger.kernel.org To: Andreas Klauer Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Dear Andreas, In message <20160516131439.GA2850@metamorpher.de> you wrote: > On Mon, May 16, 2016 at 02:58:01PM +0200, Wolfgang Denk wrote: > > Seems I was lucky - already the second of the 120 possible > > combination turned out to be working: b a c d f e > > Find a large enough file (disks * chunksize) and verify it. Running "fsck -f -n" over one of the (big, multi million files) file systems turned out to be a quick and good enough test. > With GPT partition table, I set PARTLABEL to mdnumber-role so that's > another place that has metadata in case mdadm loses its own... > Since GPT lives at beginning and end of the disk it should have a > good chance of surviving accidents, and you can address them as > /dev/disk/by-partlabel/mdnumber-* in the correct order... So far I did not use any partitioning at all on such drives. never needed it... > Anyway, glad you (hopefully, finally?) got your data back. Yes, indeed, all data recovered. And I really owe you a beer... Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de Lispers are among the best grads of the Sweep-It-Under-Someone- Else's-Carpet School of Simulated Simplicity. [Was that sufficiently incendiary? :-)] - Larry Wall in <1992Jan10.201804.11926@netlabs.com