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Date: Mon, 7 Jul 2008 15:40:10 -0400 (EDT) From: Justin Piszcz <jpiszcz@...idpixels.com> To: linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org, xfs@....sgi.com cc: Alan Piszcz <ap@...arrain.com> Subject: Re: 12 Veliciraptors again w/x4 card (1.1gbytes/sec aggregate read)! On Mon, 7 Jul 2008, Justin Piszcz wrote: > > > On Mon, 7 Jul 2008, Justin Piszcz wrote: > >> >> >> On Mon, 7 Jul 2008, Justin Piszcz wrote: >> >>> Each PCI-e x1 card has 1 veliciraptor on it now. >>> Got an x4 card wit 4 sata ports: >>> >>> Not quite the > 1 gbyte/sec I was hoping for in regards to the reads >>> but pretty close! >> >> Going to remove one of the drives from the x1 card and put it on the x4 >> card instead, then I will use all 4 SATA ports on the x4 and hopefully get >> better bw. >> > > Four drives on the x4 card, MAX bandwidth for every disk. > > p34:~# dd if=/dev/sdi of=/dev/null bs=1M & > [1] 4720 > p34:~# dd if=/dev/sdj of=/dev/null bs=1M & > [2] 4721 > p34:~# dd if=/dev/sdk of=/dev/null bs=1M & > [3] 4722 > p34:~# dd if=/dev/sdl of=/dev/null bs=1M & > [4] 4723 > p34:~# > > 120MiB/s per each one! > > Re-running dd test with all 12 disks: > > 1.1 gigabytes per second read! > bonnie++ benchmarks: http://home.comcast.net/~jpiszcz/20080707/veliciraptors_with_x4.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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