On Thu, February 12, 2009 7:11 pm, Keld Jørn Simonsen wrote:

On Thu, Feb 12, 2009 at 02:10:10PM +1100, NeilBrown wrote:

quoted

Comments and testing very welcome.

I would rather have functionality to convert raid10 to raid5.
raid1 should be depreciated, as raid10,n2 for all purposes is the same
but better implementation and performance, and raid10,f2 and raid10,o2
are even better.  Nobody should use raid1 anymore.

That is a fairly simplistic view.
raid1 supports --write-mostly and --write-behind which raid10 is unlikely
ever to support.
Certainly in many cases raid10 is just as good or better than raid1
though.

Certainly a raid10->raid5 conversion for a 2-drive n2 configuration
is trivial to arrange.  Other conversions are less likely to be supported
as they require significant non-trivial rearrangement of data.

Thanks for the comment.

NeilBrown

--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html