Raid 1+0

Matthew Seaman m.seaman at
Tue Apr 19 14:34:31 UTC 2016

On 2016/04/18 20:22, Bernt Hansson wrote:
> Newfs/mount all work. My question, is this a raid 1+0 or 0+1?
> More info can be posted if need be.

This is a RAID 10 setup.  That's the good way round.  For some reason
these RAID setups are referred to as 'RAID 10' (striped mirrors, good)
or 'RAID 0+1' (mirrored stripes, bad).  No idea why one gets a '+' and
the other not...

Note that on-board ATA Raid is often pretty simplistic.  It's basically
a software RAID setup without any benefit of hardware acceleration.
There's no real benefit to using it over using gmirror(8), and typically
a fairly big lack of support for hot swapping drives or resync'ing the
mirror without taking the system down, all of which you do get with



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