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Carl
External HD
by
on Feb 26, 2003 at 2:12:27 am

I have a desknote 2.4 ghz, 512 ram, 30 gig hd running win xp pro. I also have an external maxtor 30 gig 7200 rpm hd connected via usb 2.0. I would LOVE to capture my video to this external drive, but frames get drop when I try. It works fine capturing to the internal drive. My question is, is there anything I can do to speed up that connection to the external? Is there a way to check the speed?
By the way, I'm using a canon gl-1 and capturing via firewire. I hope this is enough info. Thank you very much for any help you can supply.
Carl


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John Q
Re: External HD
on Feb 26, 2003 at 5:18:39 am

There is no way to "speed it up". USB is designed to operate a lot of devices simultaneously. Much like the internet, data is broken down into bite-size packets that can intermingle between multiple devices. USB is simply not designed for sustained, uninterrupted fast throughput. For sustained high datarates, you need firewire or ATA100.



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Kenneth Daves
Re: External HD
on Feb 26, 2003 at 12:46:39 pm

So even USB 2.0 drives are not suitable for video capture? Interesting information.


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Carl
Re: External HD
by
on Feb 26, 2003 at 5:49:16 pm

but i thought the data transfer rate for usb 2.0 was higher than that of firewire


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Kenneth Daves
Re: External HD
on Feb 26, 2003 at 8:29:32 pm

I did too


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owen
Re: External HD
by
on Feb 26, 2003 at 8:47:50 pm

The data rate for USB-2 is higher than Firewire, but probably has more overhead to deal with. There are USB-2 DV input devices which work well (according to specs).

Edward Owen - Novice


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John Q
Re: External HD
on Feb 27, 2003 at 5:18:13 am

A DV input device is different from a hard drive. Theoretically, a firewire drive can handle the DV from my Matrox RT.X100. In reality, it can't do it without dropping frames. According to the specs, USB 2 is 40 times faster than USB 1.1. In actual use, you'll find they're only about 5 times faster.

I'll bet the USB 2 DV input device can only capture video when writing to an ATA hard drive.


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Daniel Rodriguez
Re: External HD
on May 14, 2003 at 3:11:27 am

For video, USB 2.0 steenx!

Go firewire or good old SCSI, dude!

SCSI's pricey but nowhere near the amount of BS to deal with.


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