At 6:04 PM -0500 11/3/99, Jolin Warren wrote:
>--Marc Sira said to me:
>
> > the
> > serial port on a Mac can be run with bursts of 230kb/s max, and the
> > Geoport that the 2400 and most other PCI Powermacs have can run at 2MB/s
> > max.
>
>Don't you mean 2 Mb/s for the GeoPort? 2MB/s is 16Mb/s -- significantly
>faster than USB's 12Mb/s.
GeoPort runs at 2 megabits per second max, not 2 megabytes per second.
> > The same would apply to a USB to Firewire convertor, or a USB to SCSI
> > convertor, because both of those standards are substantially faster than
> > USB-1.
>
>But they have USB to SCSI converters -- it allows you to plug a SCSI device
>into a USB port. So there must be some way of doing it (although I agree
>that it's probably not practical for serial to USB).
The SCSI host adapter (in this case the USB to SCSI converter) can
control exactly how fast SCSI runs, especially if it uses
asynchronous transfers. So it's no problem to slow SCSI down to
match speeds with USB.
Tim Seufert
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