Date: Sun, 20 Jun 2010 17:52:18 +0200 From: oizs <oizs@freemail.hu> To: freebsd-current@freebsd.org Subject: Re: Dell Perc 5/i Performance issues Message-ID: <4C1E3932.50706@freemail.hu> In-Reply-To: <4C1CB76D.8020301@stillbilde.net> References: <4C1AB4C0.4020604@freemail.hu> <4C1C88CD.3000506@stillbilde.net> <4C1C94D4.7040302@freemail.hu> <4C1CB76D.8020301@stillbilde.net>
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Could you tell me exactly how did you configure your raid? I mean wb/read-ahead/blocksize/stripe etc. Much appreciated. -zsozso On 2010.06.19. 14:26, Svein Skogen (Listmail Account) wrote: > 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) > > //Svein > >
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