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The current leading edge SCSI tranfer rate is at 320MB/s with Ultra320. Here's an IBM drive product available with that transfer rate: http://www.storage.ibm.com/hdd/ultra/36z15data.htm Chip sets are readily available to support Ultra320, and at least one company (Atto) has host adapters available now. Specs are under development for 640MB/s SCSI rates in the future... not that this has any bearing on scanning ;^) -----Original Message----- From: email@example.com [mailto:firstname.lastname@example.org]On Behalf Of Paul Corsa Sent: Thursday, May 16, 2002 5:11 AM To: email@example.com Subject: Re: Polaroid Sprintscan 4000 connectivity The list must have forgotten the 80 and 160MBps SCSI versions? In any event, most scanners don't need more than 20MBps, so the optimum choices are still SCSI-2(wide) or more current ; and Firewire; both much faster than USB1.1. No current scanners output via USB 2 to my knowledge. Paul - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.