On Fri, Apr 10, 2009 at 08:05:32AM +0300, Tapani Tarvainen wrote: > On Thu, Apr 09, 2009 at 11:09:15AM -0500, Boyd Stephen Smith Jr. > (b...@iguanasuicide.net) wrote: > > > >> Is there an advantage of software raid10 over multiple raid1 arrays > > >> joined with LVM? > > > > > >Speed. > > > > Not much, if any. LVM can stripe data across pvs ala RAID-0. > > Well, then you are doing software raid10, even though not with md. :-) > But yes, the above description is ambiguous, and indeed lvm can > do striping and mirroring (could before md was invented, or even > before Linux ever got either). > > I once compared raid0 with md vs. lvm striping (being used with > the latter from hp-ux), and decided to go with the former. > There wasn't much difference in speed as I recall, but md allowed > making bootable raid1 and it seemed better supported in Linux. >
the last time I looked at raid1 md v's lvm. the conclusions I made where
md uses 2 block devices where as setting up raid 1 lv required 3 blocks
from the vg group
Plus the day to day functionality / management of lvm raid1 is not
close to that of md
Alex
--
"Dick Cheney and I do not want this nation to be in a recession. We want
anybody who can find work to be able to find work."
- George W. Bush
12/05/2000
60 minutes II, CBS
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