Re: MD RAID6 corrupted by Avago 9260-4i controller [SOLVED]

Wolfgang Denk
2016-05-17T18:42:02Z

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

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