Re: expand raid10

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On Wed, 13 Apr 2011 13:10:16 +0200 Keld Jørn Simonsen <keld@xxxxxxxxxx> wrote:

> On Wed, Apr 13, 2011 at 07:47:26AM -0300, Roberto Spadim wrote:
> > raid10 with other layout i could expand?
> 
> My understanding is that you currently cannot expand raid10.
> but there are things in the works. Expansion of raid10,far
> was not on the list from neil, raid10,near was. But it should be fairly
> easy to expand raid10,far. You can just treat one of the copies as your
> refence data, and copy that data to the other raid0-like parts of the
> array.  I wonder if Neil thinks he could leave that as an exersize for
> me to implement... I would like  to be able to combine it with a
> reformat to a more robust layout of raid10,far that in some cases can survive more
> than one disk failure.
> 

I'm very happy for anyone to offer to implement anything.

I will of course require the code to be of reasonable quality before I accept
it, but I'm also happy to give helpful review comments and guidance.

So don't wait for permission, if you want to try implementing something, just
do it.

Equally if there is something that I particularly want done I won't wait for
ever for someone else who says they are working on it.  But RAID10 reshape is
a long way from the top of my list.

NeilBrown
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