Date: Tue, 02 Mar 2004 12:18:53 -0500 From: Chuck Swiger <cswiger@mac.com> To: Guy Van Sanden <n.b@myrealbox.com> Cc: Free BSD Questions list <freebsd-questions@freebsd.org> Subject: Re: USB 2.0 harddisk performance Message-ID: <4044C1FD.10903@mac.com> In-Reply-To: <1078214515.3868.3.camel@cronos.home.vsb> References: <1078149483.6895.7.camel@cronos.home.vsb> <404360B6.7010809@natzo.com> <1078158992.25271.2.camel@cronos.home.vsb> <1627CFD6-6BAB-11D8-A797-003065ABFD92@mac.com> <1078214515.3868.3.camel@cronos.home.vsb>
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Guy Van Sanden wrote: [ ...in reference to USB 2 vs Firewire performance... ] > Thanks for your answer. You're welcome. > I was googling for this, and I found out that you need some modules: > firewire.c fwohci.c fwohci_pci.c Yes, although FreeBSD 4.9 should have come with the module already compiled and available for use. See whether you have: /modules/firewire.ko ...on your system, otherwise add a "device firewire" and rebuild your kernel. I've used both the VIA 6306 and whatever Creative uses on the SB Audigy (Sony 3022? I forget)... > Will the fwohci driver provide better perfomance then the USB one? Right now it certainly does. I was seeing data-level throughput of ~40 MB/s or 320 megabits per sec, which is ~80% utilization of the maximum available throughput of 400 mb/s. I don't know how much protocol-level overhead is involved, but there is undoubtedly some so it seems the Firewire driver works about as efficiently as one might wish. [ Bravo, Kobayashi-san and Shimokawa-san... ] -- -Chuck
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