Date: Sat, 19 Jun 2010 14:26:21 +0200 From: "Svein Skogen (Listmail Account)" <svein-listmail@stillbilde.net> To: freebsd-current@freebsd.org Subject: Re: Dell Perc 5/i Performance issues Message-ID: <4C1CB76D.8020301@stillbilde.net> In-Reply-To: <4C1C94D4.7040302@freemail.hu> References: <4C1AB4C0.4020604@freemail.hu> <4C1C88CD.3000506@stillbilde.net> <4C1C94D4.7040302@freemail.hu>
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On 19.06.2010 11:58, oizs wrote:
> I tried almost everything raid 0 1 5 10 with all kind of stripes
> 32/64/128 and settings direct io/cached/read-ahead/wt/wb/disk-cache but=
> nothing seems to work.
> I changed the card to another dell perc 5 which had an older firmware.
> Tried 4 kind of motherboards even tried changing the os to linux and
> windows xp/7. In windows I got some funny results 1.3MB/s with
> write-back and 150MB/s reads with 5 disks in raid0.
> I just wanted to have a hw raid with no problems since the motherboard
> 88sx7042 and bsd did not like eachother.
This is from a similar controller running that 8-disk raid5+0 setup:
--------------------------------------------------
CrystalDiskMark 2.2 (C) 2007-2008 hiyohiyo
Crystal Dew World : http://crystalmark.info/
--------------------------------------------------
Sequential Read : 665.383 MB/s
Sequential Write : 300.452 MB/s
Random Read 512KB : 616.604 MB/s
Random Write 512KB : 306.306 MB/s
Random Read 4KB : 64.465 MB/s
Random Write 4KB : 7.646 MB/s
Test Size : 100 MB
Date : 2010/06/19 14:24:12
You should be looking at number about half of these. I ran the test with
adaptive readahead enabled, and write-through for cache (since I run
with BBU, I normally use write-back)
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