Very Poor Raid Card Performance

[Bill Moran]

In response to "Steven Lowry" <steve at midden.org>:
> 
> I have been very impressed with my FreeBSD 6.2 install, I have nearly
> everything working but there are a few things which I need help with.
> 
> The main problem is my HD performance, it is approx 6x slower than in
> windows XP, hopefully there is a solution. I have an LSI Megaraid 8x with
> four drives in a raid 5 configuration, in windows I was getting up to 60MB/s
> transfer rates but in FBSD I am getting up to 9MB/s. I followed the
> instructions in the handbook for tuning disks and I have set dma on.
> Being new to unix, I have no idea what to try or get system information
> too continue troubleshooting.
> If anyone could point me in the right direction or to appropriate
> documentation
> it would be much appreciated.

You should provide the details of how you arrived at those numbers.
Please provide details of your testing methodology.

While it's impossible to compare apples to apples when pitting Windows
against FreeBSD, you at least want to be comparing two fruits -- not
apples and buffalo steaks or something like that.

-- 
Bill Moran
Collaborative Fusion Inc.