Re: Mixed and raid [was Re: BUG: btrfsRe: Does btrfs "raid1" actually provide any resilience?]

[Goffredo Baroncelli <kreijack@libero.it>]

On 2013-11-15 08:12, Duncan wrote:
> Goffredo Baroncelli posted on Thu, 14 Nov 2013 22:21:22 +0100 as
> excerpted:
> 
>> after some tests and looking at the code I discovered that the current
>> mkfs.btrfs doesn't allow any raid profile other than SINGLE for data and
>> meta-data when the mixed metadata/data group is enabled.
> 
> That'd be a big problem for me, here, as I run a separate sub-GiB (640 
> MiB) btrfs filesystem /var/log, in data+metadata raid1 mode.  (The 
> mountpoint is actually /lg, with /var/log a symlink pointing at it.)
> 
[...]
> 
> You're saying data+metadata DUP wouldn't be possible here either, which 
> would make me pretty unhappy too.

The problem should be in mkfs.btrfs not in the btrfs kernel code. So if
the filesystem was created, there should be not problem.

> 
> Fortunately I did those mkfs.btrfs on an earlier btrfs-tools so wasn't 
> affected by this bug, but bug I would indeed call it, for sure!

Anand posted a patch few hours ago (which worked for me). I think that
this bug could be addressed quickly.

BR


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