[OM] Re: Macs r us

[Chuck Norcutt]

If what you say is true then Macs must have very poor implementations of 
USB 2.0.  Despite USB 2.0's faster instantaneous trasfer rate Firewire 
is faster than USB 2.0 for applications such as hard drives.  However, 
the data rate on a scanner doesn't come anywhere near the capacity of 
either interface.  The specs on my Epson V700 scanner (which is fairly 
fast) claim a scan time of 12.3 ms per scan line at 4800 dpi which 
produces 122,000 16-bit pixels.  That equates to 158.7 megabits/second 
or about 1/3 of USB 2.0's 480 megabit transfer rate.  Epson provides 
both interfaces on this scanner and neither is recommended over the 
other nor are they spec'd differently for scanner performance.  I think 
the reason is that neither interface is even breathing hard at this data 
rate.

Chuck Norcutt

iwert bernakiewicz wrote:

> 
> btw, keep in mind that scanning will be a lot faster using firewire than usb
> 2 on a mac, and that firewire 400 can be used on an 800 port (through
> adapter) without speed penalties.
> 
> Iwert

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