200 gig hard drive vs. dividing hard imac drive

[sb]

some more info...

The bandwidth for firewire 400 is so much greater than you need for dv
capture that there is enough room to pass the video thru the harddrive into
the computer and then record it onto the drive.

If you are not having problems using two separate ports, go ahead and keep
doing it the same way, but keep in the back of your head that if you use a
Powerbook, you are going to have to daisy chain (only one FW port, unless
you add a CardBus), and if you change external HDs, you might need to also.

And, while running FCP you especially don't want to have 2 firewire VIDEO
devices plugged in at the same time, i.e. a camcorder and a media converter
box, since FCP won't know which one you mean.

sb

On 1/13/03 1:00 PM, "Michael Winter" <winter at mac.com> wrote:

> 
> On Saturday, January 11, 2003, at 05:48  PM, sb wrote:
> 
>> So, captured media on the external, projects saved on the internal.
>> 
>> Make sure you only have one firewire device plugged into the computer.
>> You'll need to daisy chain the drive with a camera or converter box.
> 
> I'm fairly new to this, so I don't understand why you would want to do
> it this way : daisy chain vs each plugged into the computer. Especially
> since I've been doing the latter without any trouble. Maybe if I
> explain my thinking, you can tell me where I'm going wrong.
> 
> Even though Firewire is a peer-to-peer protocol, my assumption was that
> the video stream has to go from the video device (camera or converter)
> to the computer, then to the drive (that's how it works for internal
> drives) anyway. If that is the case, then you're forcing two video
> streams (in from device, out to drive)  to share the bandwidth of a
> single Firewire port (400 Mbps). By plugging the video device and the
> drive each into the their own plug on the Mac, each stream has 400 Mbps
> to play with, since each plug on most (all?) Macs is a separate bus.
> 
> Am I wrong about that assumption? Is FCP (or iMovie) just
> initiating/terminating transfers between peers? IOW, is the one video
> stream from the video device being saved by the drive and monitored by
> the computer? Unfortunately the documentation for iMovie doesn't even
> come close to giving this kind of information and I don't have FCP.
> 
> -Mike
> 
> 
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