Date: Sat, 28 Jun 2003 02:35:12 +0900 From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> To: Brian Candler <B.Candler@pobox.com> Cc: freebsd-firewire@freebsd.org Subject: Re: Firewire resets/performance problems Message-ID: <ybsptkzjuen.wl@ett.sat.t.u-tokyo.ac.jp> In-Reply-To: <20030627110317.GA60951@uk.tiscali.com> References: <20030627101841.GA60838@uk.tiscali.com> <20030627110317.GA60951@uk.tiscali.com>
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At Fri, 27 Jun 2003 12:03:17 +0100, Brian Candler wrote: > > On Fri, Jun 27, 2003 at 11:18:41AM +0100, Brian Candler wrote: > > (1) Data transfer is extremely slow. Using 'dd' to read from /dev/da0, I get > > perhaps 10MB per minute; using 'dd' to write is maybe 3MB per minute max. > > Supplementary information: > > My system also has a SCSI card with a couple of CD-ROMs on it, so that's > scbus0 and the firewire is scbus1. > > I just tried removing the SCSI card and the firewire is zooming along (8MB > per second!) > > This may or may not be a red herring - perhaps it's just the fact that I did > a reboot - but is it possible that something is wrongly assuming the device > to be on scbus0 when it's on scbus1 ? > > Regards, > > Bran. I thinks there is no difference between scbus0 and scbus1 at CAM layer. I suspect you have problem in PCI bus and removing the SCSI card hides the problem. You can easily exchange scbus 0 and 1 without removing the card by adding the following line into the kernel config file. device scbus0 at sbp0 /\ Hidetoshi Shimokawa \/ simokawa@sat.t.u-tokyo.ac.jp PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html
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