Re: How to stress test raid6 on 122 disk array

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> Looking at the kernel log itself, you've got a ton of write errors on
> /dev/sdap.  I would suggest checking that particular disk with smartctl, and
> possibly checking the other hardware involved (the storage controller and
> cabling).
>
> I would kind of expect BTRFS to crash with that many write errors regardless
> of what profile is being used, but we really should get better about
> reporting errors to user space in a sane way (making people dig through
> kernel logs to figure out their having issues like this is not particularly
> user friendly).

Interesting!

Why does it speak of "device sdq" and /dev/sdap ?

[337411.703937] BTRFS error (device sdq): bdev /dev/sdap errs: wr
36973, rd 0, flush 1, corrupt 0, gen 0
[337411.704658] BTRFS warning (device sdq): lost page write due to IO
error on /dev/sdap

/dev/sdap doesn't exist.
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