[Gllug] USB Discs

[Mike Brodbelt]

On Tue, 2002-11-05 at 18:05, Andy Farnsworth wrote:
> Whoops, I don't know where you got your numbers, but lets work them through.
> 
> USB - 12 Mb/s =~ 1.5 MB/s
> USB 2.0 - 480 Mb/s =~ 60 MB/s
> Firewire - 400 Mb/s =~ 50 MB/s
> 
> While these throughput speeds are maximums, hard drive sustained transfer
> speeds are much less.  As long as you are reading from the Hard Drive's
> cache you will reach these speeds.  A decent IDE drive will get 35 MB/s
> (about 20x faster than USB 1.1) while a laptop drive will get less than
> that.

FWIW, I've been using an Iomega Peerless drive with a Firewire
interface. On a 20Gb Iomega catridge, formatted with XFS, sustained
write speeds of approx 17MB/s seem reliably reachable. I've found the
kernel firewire support in 2.4.19 to be fine.

Mike.


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