Jon Nelson wrote:
On Feb 6, 2008 12:43 PM, Bill Davidsen <davidsen@xxxxxxx
<mailto:davidsen@xxxxxxx>> wrote:
Can you create a raid10 with one drive "missing" and add it later? I
know, I should try it when I get a machine free... but I'm being
lazy today.
Yes you can. With 3 drives, however, performance will be awful (at
least with layout far, 2 copies).
Well, the question didn't include being fast. ;-)
But if he really wants to create the array now and be able to add to it
later, it might still be useful, particularly if "later" is a small time
like "when my other drive ships." Thanks for the input, I thought that
was possible, but reading code isn't the same as testing.
IMO raid10,f2 is a great balance of speed and redundancy.
it''s faster than raid5 for reading, about the same for writing. it's
even potentially faster than raid0 for reading, actually.
With 3 disks one should be able to get 3.0 times the speed of one
disk, or slightly more, and each stripe involves only *one* disk
instead of 2 as it does with raid5.
I have used raid10 swap on 3 or more drives fairly often. Other than the
Fedora rescue CD not using the space until I start it manually, I find
it really fast, and helpful for huge image work.
--
Bill Davidsen <davidsen@xxxxxxx>
"Woe unto the statesman who makes war without a reason that will still
be valid when the war is over..." Otto von Bismark
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
