Re: USB reset + raid6 = majority of files unreadable

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On Wed, Feb 26, 2020 at 5:39 PM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
>
> > Feb 10 19:38:36 meije kernel: BTRFS info (device sda): disk added /dev/sdb
> > Feb 10 19:39:18 meije kernel: BTRFS info (device sda): relocating
> > block group 10045992468480 flags data|raid5
> > Feb 10 19:39:27 meije kernel: BTRFS info (device sda): found 19 extents
> > Feb 10 19:39:34 meije kernel: BTRFS info (device sda): found 19 extents
> > Feb 10 19:39:39 meije kernel: BTRFS info (device sda): clearing
> > incompat feature flag for RAID56 (0x80)
> > Feb 10 19:39:39 meije kernel: BTRFS info (device sda): relocating
> > block group 10043844984832 flags data|raid5
>
> I'm not sure what's going on here. This is a raid6 volume and raid56
> flag is being cleared? That's unexpected and I dn't know why you have
> raid5 block groups on a raid6 array.


OK part of my confusion is that you sorta threadjacked, while still
being on topic, and didn't realize you weren't the original poster. So
you started out with a raid5 from the get go. Original poster had a
raid6.

I still don't know why you're getting messages:

clearing incompat feature flag for RAID56 (0x80)

I think that's confusing if you haven't asked for a conversion from
raid5 to a non-raid56 profile.



-- 
Chris Murphy



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