Re: bcache error -> btrfs unmountable

[Jean-Denis Girard <jd.girard@sysnux.pf>]

Hello Pavel,

Le 12/11/2020 à 21:59, Pavel Goran a écrit :
> Hello Jean-Denis,
> 
> See comments inline.
> 
> Friday, November 13, 2020, 6:25:15 AM, you wrote:
> 
>> Hi list,
> 
>> I have a RAID1 Btrfs (on sdb and sdc) behind bcache (on nvme0n1p4):
> 
> What's the cache mode? Writeback, writethrough, writearound?

Sorry I forgot that important information: mode was Writeback.


> You could try to detach the *cache* from the bcache devices, and then try to
> use the bcache devices as before; it should be possible and harmless,
> *unless* the cache mode is "writeback". If it's "writeback", things are more
> complicated, and I'll leave them to more experienced people around.

ok, as I have Writeback, I'll wait for further instructions.

> IMPORANT: The kernel logs below indicate that bcache failed to do IO on the
> cache device. It could be a hardware problem with your NVMe device, so I
> suggest you look at its SMART, ASAP.

Yes, the nvme is having problem... I'll replace it ASAP.


Thanks for your reply Pavel,
Best regards,
-- 
Jean-Denis Girard

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