[nycbug-talk] Fwd: Adaptec AAC raid support
pete wright
nomadlogic
Mon Mar 21 15:23:42 EST 2005
On Mon, 21 Mar 2005 14:04:54 -0500, Marco Scoffier <marco at metm.org> wrote:
> On Mon, Mar 21, 2005 at 01:15:46PM -0500, Isaac Levy wrote:
> >With that stated, as the dust is settling with this issue- and myself
> >being a bit outside of the daily-use OpenBSD camp, what is everyone
> >going to use for RAID on OpenBSD? (I'm particularly interested in sata
> >hardware raid...?!?)
> >
>
> What I wonder is if hardware is really the way to go. What's the difference in
> overhead btw say a hardware raid5 and putting the card in jbod mode and running
> raidctl. [ I have not googled this lately ]
I think it probably depends on what you are going to be using your
RAID setup in. For example on some systems I've worked on where we
have needed high/sustained throughput we actually used a mixture of
hardware RAID and software mirroring/parity management.
The main benefit I see with hardware RAID controllers are Battery
Backup Units and higher through-put with lower overhead, and lower
system utilization when rebuilding disks. Also, to fully utilize
features of the BBU for example, one needs interact directly with the
SCSI controller.
-p
--
~~o0OO0o~~
Pete Wright
www.nycbug.org
NYC's *BSD User Group
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