On Tue, Aug 11, 2015 at 3:47 PM, Chris Murphy <li...@colorremedies.com> wrote:

>
> Huh. I thought nodatacow applies to an entire volume only, not per
> subvolume unless you use chattr +C (in which case it can be per
> subvolume, directory or per file). I could be confused, but I think
> you have mutually exclusive mount options.

Well, at the time I set up this system, I asked on IRC, and people
said it should work.  I've never seen any errors from this.


>>
>> [94312.091613] BTRFS info (device sdc): allowing degraded mounts
>> [94312.091618] BTRFS info (device sdc): disk space caching is enabled
>> [94312.194513] BTRFS: bdev (null) errs: wr 1724, rd 305, flush 45,
>> corrupt 0, gen 2
>> [94319.824563] BTRFS: checking UUID tree
>
> I don't see any mount failure message. It worked then?

Yes and no.  It's mounted, but a scrub aborts silently:

# btrfs scrub status /mnt/btrfs/
scrub status for ecdff84d-b4a2-4286-a1c1-cd7e5396901c
scrub started at Tue Aug 11 13:56:36 2015 and was aborted after 01:31:55
total bytes scrubbed: 2.19TiB with 0 errors

No new messages appeared in dmesg, so I can't tell why it aborted.
It's also odd that it reports zero errors, given that it aborted.



-- 
Timothy Normand Miller, PhD
Assistant Professor of Computer Science, Binghamton University
http://www.cs.binghamton.edu/~millerti/
Open Graphics Project
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