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Date:      Mon, 4 Mar 2002 17:55:12 -0800 (PST)
From:      John Kozubik <john@kozubik.com>
To:        James <merlin@brown-bird.com>
Cc:        hackers@FreeBSD.ORG, freebsd-firewire@FreeBSD.ORG
Subject:   Re: periodic firewire max-out question
Message-ID:  <Pine.BSF.4.21.0203041750170.93379-100000@www>
In-Reply-To: <Pine.LNX.4.21.0203040946140.21698-100000@wormhole.workshop.foo>

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typo.  63 is the number I intended in both cases.

I am basically just inquiring as to the practical problems one might face
when actually maxing out the spec, with 63 devices in one adaptor.

You are correct - none of those multi-port adaptors actually have two
buses.  I am not sure if anyone has plans on a multi-bus adaptor.

Since posting this question, I have received quite a bit of anecdotal
evidence that suggests that actually having 63 devices on the chain at
once is _very_ difficult.  Most people report running into problems at
around 20-30 devices.  Power is also an issue, if the devices are
bus-powered as opposed to wall-powered.

-----
John Kozubik - john@kozubik.com - http://www.kozubik.com



On Mon, 4 Mar 2002, James wrote:

> > From: John Kozubik <john@kozubik.com>
> >
> > I still do not yet own 63 firewire devices, and so, once again, I am
> > wondering if anyone here has ever actually connected 128 devices to a
> 
> 	Huh? How did you get from 63 devices to 128?
> 
> 	I don't know of any multi-bus 1394 adapters on the consumer
> market. Adapters have multiple ports but all are on the same bus. I'd be
> curious to find one that actually has more than one bus.
> 
> -James
> 
> 
> 
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