Re: raid10 for softraid(4)

[Alexey E. Suslikov]

Dmitry Bogdan dmitry.bogdan at gmail.com writes:

 Is there any interest in the raid10 independent discipline
 in openbsd community?

With hardware based RAID-controllers our company
prefer RAID10 for better write speeds (because
RAID5 needs parity calculations, for instance).

We also use softraid(4) mirroring a lot. And, yes,
having RAID10 with softraid(4) would be nice.

We'll be checking tech@ for your diffs ;) and will
be glad to test them.

Cheers,
Alexey

Re: raid10 for softraid(4)

[Jiri B]

On Wed, Feb 20, 2013 at 04:48:57PM +1000, Dmitry Bogdan wrote:
 Hi,
 I am interested in implementing layered RAID10 for softraid(4) as a
 part of my course project in the university.
 
 I have a vast expirience in using software raids in openbsd and other
 operating systems and was surpised that softraid(4) does not support
 layered RAID10. I know that it is possible to implement raid10
 manually (using softraid0 over softraid1), effectively using a lot of
 drives for speed access without using CPU intensively (compared to
 raidp and raid6). But if you also want to encrypt it via softraid, it
 will look like a nightmare to support softraid over softraid over
 softraid. Raid10 is not an uncommon solution and is often implemented
 as an independent discipline.
 
 Is there any interest in the raid10 independent discipline in openbsd 
 cummunity?

http://marc.info/?l=openbsd-miscm=136034083308418w=2

jirib