"Bill Hilton" wrote in message
From: "Liz"
but am I going to scan much faster if I throw this in the machine ??
USB 2.0 is, in theory, 40x faster than USB 1.1 … however, in real life
with
real devices the speed improvement is typically much less. Just how much
less
depends on the actual speed of the devices. As one example, I compared
USB 1.1
vs 2.0 compact flash memory card readers and the 2.0 reader was about 5x faster.
Dunno about your scanner, many of them are pretty slow so the data is transferred in the background while the next line is scanned. So you may
or
may not see a big improvement. One way to check is to ask if anyone has
this
same scanner running on USB 2 and see if they’re running a lot faster.
well, you’re right, Bill … but I figured I’d be lucky if I got a few answers at all … much less from a bunch of Epson Perfection 3170 Photo scanner owners who had switched from 1.1 to 2.0 and done timings 😉
I don’t know what the relative percentages of time spent scanning vs. transferring might be … and, though your point seems well taken about "interlinear transfer," if the scanner has a limited buffer (and of course it DOES have some limit) then I assume that the scan process will wait for the buffer to be sent … if not, where is your data going ??
in any case, thanks for responding !