Date: Tue, 04 Mar 2008 10:47:48 -0800 From: Lamont Lucas <lamont@cluepon.com> To: alan bryan <alan.bryan@yahoo.com> Cc: freebsd-performance@freebsd.org Subject: Re: 7.0-Release and 3ware 9550SXU w/BBU - horrible write performance Message-ID: <47CD9954.5040105@cluepon.com> In-Reply-To: <497790.39526.qm@web50507.mail.re2.yahoo.com> References: <497790.39526.qm@web50507.mail.re2.yahoo.com>
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alan bryan wrote: > Hi, > > I've got a new server with a 3ware 9550SXU with the > Battery. I am using FreeBSD 7.0-Release (tried both > 4BSD and ULE) using AMD64 and the 3ware performance > for writes is just plain horrible. Something is > obviously wrong but I'm not sure what. Hello Alan. Have you ever used this card with any other OS? I have about 6 of them running under linux and I too get horrible write performance from them. After several days of tuning and research, I've concluded that the cards are just stinkers reguardless of what OS they are running. That seems to be the consensus if you google 3ware write performance. I've put them in 64 and 32 bit slots, various speeds and with various drives. I had an older 3ware card running under FreeBSD 6.2 that would give decent read performance in a raid0 configuration but terrible write performance. I performed no tuning on that setup, as my application was mostly read and it was "good enough" for the time. Not terribly helpful, I admit, but I wanted you to at least think about it being the card rather than the OS.
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