Re[4]: Filesystem sometimes Hangs

["Hendrik Friedel" <hendrik@friedels.name>]

Hello Chris,

thanks again for your reply.

>
>>  5.10.0-0.bpo.3-amd64
>
>It's probably OK. I'm not sure what upstream stable version this
>translates into, but current stable are 5.10.27 and 5.11.11. There
>have been multiple btrfs bug fixes since 5.10.0 was released.
>
>I missed in your first email this line:
Ok, I am compiling 5.11.11.
>>[Mo Mär 29 09:29:21 2021] BTRFS info (device sdc2): turning on sync discard
>
>Remove the discard mount option for this file system and see if that
>fixes the problem. Run it for a week or two, or until you're certain
>the problem is still happening (or certain it's gone). Some drives
>just can't handle sync discards, they become really slow and hang,
>just like you're reporting.

In fstab, this option is not set:
/dev/disk/by-label/DataPool1            /srv/dev-disk-by-label-DataPool1 
        btrfs   noatime,defaults,nofail 0 2

How do I deactivate discard then?
These drives are spinning disks. I thought that discard is only relevant 
for SSDs?

Regards,
Hendrik

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