Subject: Re: 3ware RAID controller slow?
To: Jukka Marin <firstname.lastname@example.org>
From: Michael van Elst <email@example.com>
Date: 10/28/2007 23:43:16
On Mon, Oct 29, 2007 at 12:04:47AM +0200, Jukka Marin wrote:
> Then why is RAID5 slow and a plain disk isn't (when extracting the same
> pkgsrc tarball)? I'm trying to find out whether I can use RAID5 or not,
> that's why I'm asking ;)
RAID5 can be slow when you don't write full stripes, but even then
it is usually not much slower than a single drive.
Some RAID controllers are also very slow when you disable the
write cache. Can you verify your setup?
Michael van Elst
"A potential Snark may lurk in every tree."