I don't dispute Firewire's superior architecture. That's why it's
sustained transfer rate is faster than USB 2.0 even though USB 2.0 has a
faster instantaneous rate. My only point is that scanners (even high
res and very fast ones) don't begin to stress either interface. My
computer has 6 USB 2.0 ports and only 3 or 4 are in use so I've never
needed a USB hub. My external drives are SATA 3... much faster than
Firewire. Same interface as the two internal drives.
Chuck Norcutt
iwert bernakiewicz wrote:
> Indeed, until the latest Macbook (pro) usb 2 was very slow on the mac. And
> maybe I'm remembering the times of USB 1.0, since that was the last time I
> used a scanner witrh USB. Since then it has been firewire. Firewire has one
> big advantage hewever: I can plug the scanner into the harddrive, as well as
> my card reader, without needing a hub, like usb....
> Iwert.
>
> 2008/10/26 Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
>
>> 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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