Date: Wed, 02 Sep 2009 07:38:49 -0500 From: "James R. Van Artsdalen" <james-freebsd-current@jrv.org> To: "Derek (freebsd lists)" <482254ac@razorfever.net> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: siis/atacam/ata/gmirror 8.0-BETA3 disk performance Message-ID: <4A9E6759.7090700@jrv.org> In-Reply-To: <4A9E5F34.2090700@razorfever.net> References: <4A9E5F34.2090700@razorfever.net>
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Derek (freebsd lists) wrote: > I get about 40MB/s read, and 30MB/s write. See attached > bench-*.txt files. That's too slow. As I posted on July 31 I got sustained read rates of 875 MB/s across ten disks, through two 3124 cards and four port multipliers. The system I tested was a dual processor Opteron 244 (1.8 GHz) running amd64. Perhaps more important, my disk controllers were on two different PCI-X buses with ample bandwidth (100 MHz 64-bit and 133 MHz 64-bit). Is your disk controller on a PCI bus, and is there any other PCI traffic at the time?
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