[MacDV] Re: Hard drive for iBook video editing

[Mark M. Florida]

Wow, Richard, sounds like you've really pushed the FireWire setup hard. 
  I'm glad lots of people have had success with FireWire drives with a 
DV device on the same bus.  Maybe I was basing my comments on my past 
experience with my PowerBook G3/500 and an older non-Oxford 
FireWire-ATA bridge.  I have a newer Pyro FireWire drive case with 
Oxford 911 chip -- I should try that out with my PowerBook and Sony 
miniDV cam.  And come to think of it, Apple made many improvements with 
their FireWire controller since my old PowerBook was released.

I guess it wouldn't hurt to make sure the place you by your FireWire 
drive from has a no-hassle return policy, like if you don't like it, 
they'll take it back no problem.

1 cent.

- Mark

On Monday, March 3, 2003, at 06:03 PM, Richard Brown wrote:

> I used a Firewire hub to combine a PD150 for monitoring and I/O with 
> two 120GB Firewire drives in ADS Pyro Firewire Cases (with Oxford 911 
> chips.) Rock solid for heavy, demanding DVCAM editing for weeks on end 
> using FCP3. We never went past 8 video tracks and 8 audio tracks, 
> however...
>
> Richard Brown
>
> On Monday, March 3, 2003, at 01:57 PM, Michael Winter wrote:
>
>>
>> On Monday, March 3, 2003, at 02:37  PM, Mark M. Florida wrote:
>>
>>> The problem with using FireWire drives for DV capture is not that 
>>> the drives themselves or the FireWire interface aren't fast enough, 
>>> it's that there's contention with the FireWire bus when transferring 
>>> to/from a FireWire camera on the same bus -- both devices *want* 
>>> control, but only one of them *gets* it.
>>
>> I've only tested having both the Firewire drive and the video source 
>> on the same Firewire bus, but didn't have any trouble. The reason I 
>> did this testing was based on an earlier thread on the list titled 
>> "200 gig hard drive vs. dividing hard imac drive" in case anyone 
>> wants to look it up in the archive.
>>
>> From that thread I found that "Real world firewire 400 is 27MB to 
>> 35MB/sec., maybe 37MB/sec." and DV capture only requires 3.6 MB/sec 
>> (courtesy of sb). Plenty of bandwidth for the job. It was also 
>> indicated that having the hard drive and the video source 
>> daisy-chained was not a problem, which my testing verified (to my 
>> satisfaction).
>>
>> Now wether or not there may be other bottlenecks in the iBook that 
>> cause problems, I don't know.
>>
>> -Mike
>
>
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