[Discuss] On Btrfs raid and odd-count disks

[Dan Ritter]

On Wed, Apr 10, 2013 at 11:00:21AM -0400, Derek Atkins wrote:
> "Edward Ned Harvey (blu)" <blu at nedharvey.com> writes:
> 
> >> From: discuss-bounces+blu=nedharvey.com at blu.org [mailto:discuss-
> >> bounces+blu=nedharvey.com at blu.org] On Behalf Of
> >> 
> >> Its funny, but I never considered an odd number of drives as viable for
> >> raid1.
> >
> > What about a 3-way mirror?
> > More appropriately, look up raid-1e.  It's a better description of btrfs raid-1.
> 
> Is there a way to set up btrfs such that it can suvive a failure of any
> two disks in the array (ala raid6 or raid-z2)?


n-way mirroring (survive n-1 failures) is planned, but not yet
in the main line. RAID5 and 6 are currently experimental.

-dsr-