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You are here: MacNN Forums > Software - Troubleshooting and Discussion > Mac OS X > External Firewire drives using loads of CPU 4 u?

External Firewire drives using loads of CPU 4 u?
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Grizzled Veteran
Join Date: Aug 1999
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Nov 2, 2003, 06:57 AM
 
Man, i dunno if this shiot is happning to other peeps but i have a Pismo G3 Powerbook with a 900mhz CPU upgrade. I have a 120gig Seagate cuda 7200rpm 8meg cache disk in an external case with a Oxford 911 chipset.

I was playing this wikid prOn '.avi' (mun she was soooo fit ;-) i noticed the CPU meter was totally maxed out an the movie in VLC was very choppy an played less than 1/2 the frame rate. VLC produced sheetloads of dropped frames error messages. This '.avi' movie has a pretty small frame size, even when i scaled the thing down to like 1cm x1cm the CPU was still totally maxed out.

Now, i copy this same pr¯n movie to the internal 40gig 4200rpm , load it into VLC an it plays perfectly even in Full Screen mode.

Explain that!!! My guess is the Firewire Bus on these Pismo's are only 200megabit ........but still DV only requires like 4 meg/sec 4 playback....So i find it highly suspect that the Firewire/ext drive is not capable of 4meg/sec.

This is under Panther btw...

any thoughts? wikid
     
Targon  (op)
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Nov 3, 2003, 05:14 AM
 
brockout
     
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Join Date: Jul 2001
Location: Sydney, Australia
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Nov 3, 2003, 05:18 AM
 
My tibook 400/500 used to get be slow using firewire devices - the firewire on those machines is just old and badly designed. When the dual USB ibook was released they fixed it.

You can't eat all those hamburgers, you hear me you ridiculous man?
     
Mac Elite
Join Date: May 2001
Location: Belgium
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Nov 3, 2003, 07:56 AM
 
Try Mplayer, most avis that drop frames in VLC play fine on Mplayer, I still use Mplayer 1 and not the never Mplayer 2 because the sound is almost always out of sync when I use this version. See if you still can find version one...
     
   
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