Date: Thu, 19 May 2005 21:43:06 -0700 From: Lamont Lucas <lamont@cluepon.com> To: Alexis Yushin <alexis@ww.net> Cc: freebsd-performance@freebsd.org Subject: Re: Bad 3ware 9000 performance 5.4? Message-ID: <20050520044306.GH99527@clavin.cluepon.com> In-Reply-To: <20050520031332.GA98548@virgin.ww.net> References: <20050520031332.GA98548@virgin.ww.net>
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On Fri, May 20, 2005 at 05:13:32AM +0200, Alexis Yushin wrote: > Running FreeBSD 5.4... three machines with twe/3ware 8000 and three twa/ > 3ware 9500-8 controllers. All of them running RAID 1+0 without write cache > since we dont have battery backup unit. All of them Seagate 7200 SATA. > > I get about 46Mb/s write on the 8000 series and only 5(!)MB/s on the 9500 series. I recently ran some tests with large sequential writes on a stock 5.4-RC? machine with 4 400GB seagates and a 3ware 9500-12MI. In those tests I got roughly 90 MB/s write on a large raid0 stripe and 66 MB/s on a raid5 setup. I also do not have the battery backup unit. Tweaking the stripe size away from the default made only minor changes. I was also only using a 32 bit pci interface as the motherboard I was testing with didn't have a 64 bit slot. I made no changes to the kernel and even let newfs run with the defaults. That was just a proof of concept run for the larger 9.6 TB 2 9500-12 raid that I'm building tomorrow. I'll let you know if I run into similar problems to yours with multiple cards. -- - Lamont "I am not an atomic playboy."
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