[OmniOS-discuss] areca or lsi

[David Bomba]

High quality RAID cards don't just perform simple passthrough, even thou we
would expect this to be all that is needed in a ZFS implementation.

The controller will (at least in Areca's case) utilise writeback caching to
improve performance, driver implementation is also a major factor in
performance. We've seen significant performance improvements with firmware
upgrades on Areca cards.

On 19 July 2013 10:03, Saso Kiselkov <skiselkov.ml at gmail.com> wrote:

> On 18/07/2013 23:48, Tobias Oetiker wrote:
> > Folks,
> >
> > We are specing a new omnios server box ... and were just told by
> > our vendor, that LSI HBAs were much slower (50%) than Areca Controllers
> > running in JBOD mode ... and that they would therefore recommend
> > Areca (we use areca for raid6 in linux boxes, but have never used it in
> JBOD
> > mode with illumos, yet).
> >
> > Which controller would you choose for a new system ?
>
> Hi Tobi,
>
> I'm using LSI exclusively, never had an issue with them. Their 6G SAS
> HBAs are very affordable and remarkably solid. As for the ARECA vs LSI
> debate, I'd contest that there's going to be any appreciable performance
> difference. *IF* you're running in JBOD, the card should essentially be
> a simple pipe for SCSI commands to the SAS bus with as little overhead
> possible. I know for a fact that saturating a 6G SAS link isn't a
> problem with LSI cards, so I'm somewhat at a loss as to where the
> performance difference is supposed to lie.
>
> Cheers,
> --
> Saso
> _______________________________________________
> OmniOS-discuss mailing list
> OmniOS-discuss at lists.omniti.com
> http://lists.omniti.com/mailman/listinfo/omnios-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omniosce.org/ml-archive/attachments/20130719/c4940f49/attachment.html>