IBM eServer 346 ServeRaid is too slow

Doug White dwhite at
Fri Apr 8 10:19:07 PDT 2005

In the future, don't cross post -questions and other lists. I'm
leaving the cc: on since we may have people watching the thread,
but please remove -questions for any followups. Thanks.

On Thu, 7 Apr 2005, Brian Behlendorf wrote:

> On Thu, 7 Apr 2005, Carl Makin wrote:
> > I'd say you are seeing the same as I am with the same card in a Dell 1855.
> > There is something wrong with the mpt driver and the disks when they are
> > setup in a raid0 set.  If you split the disks and use them as individual
> > drives then you will get full performance.
> It's also a known problem, though not being tracked very well.
> Doesn't look like (from viewcvs.cgi) there's been any recent work on
> this.

We're waiting on a driver update that is tied up in legalities at the

Doug White                    |  FreeBSD: The Power to Serve
dwhite at          |

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