Re: Input/output error on newly created file

[Nikolaus Rath <Nikolaus@rath.org>]

On May 12 2016, Diego Calleja <diegocg@gmail.com> wrote:
> El jueves, 12 de mayo de 2016 8:46:00 (CEST) Nikolaus Rath escribió:
>> *ping*
>> 
>> Anyone any idea?
>
> All I can say is that I've had the same problem in the past. In my
> case, the problematic files where active torrents. The interesting
> thing is that I was able to read them correctly up to a point, then
> I would get the same error as you. No messages in dmesg. The amount
> of data I was able to read from them was not random, it was
> something multiple of 4K. After reboot the problems went away and
> I wasn't able to reproduce it.
>
> There has been reports of similiar issues in the past:
> http://www.spinics.net/lists/linux-btrfs/msg52371.html

Thanks for the pointer. So according to these reports, the IO errors
happen with:


1. dm-crypt, LVM and mount options
   rw,noatime,compress=lzo,ssd,discard,space_cache,autodefrag,inode_cache
2. dm-crypt, no LVM, and mount options
   noatime,compress,nossd

I can add the following data point:

3. dm-crypt on LVM, and mount options
   relatime,compress=lzo


(Just to preserve this for the future)


Best,
-Nikolaus
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