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To: Jim McMannis who wrote (63299)8/25/1998 12:41:00 AM
From: rudedog  Read Replies (1) | Respond to of 186894
 
12 mbps = 1.1 mbytes /s compared to 40 MB/s for ultrascsi, and that's if there is nothing else on the USB... it could work OK for backup but no speed demon. for comparison, that's about twice the speed of things that plug into a bidirectional printer port.



To: Jim McMannis who wrote (63299)8/25/1998 6:09:00 AM
From: Gary Ng  Read Replies (1) | Respond to of 186894
 
Jim, Re: I know what you are saying but the USB on the iMAC is 12 mps

It is 12Mbps which is 12M bits per second divided that
by 8 which gives you 1.5MBps which is 1.5M Bytes per
second.

For some comparision :

UDMA is 33MBps (33M Bytes per second)

SCSI (the slowest is 5MBps or 5M Bytes per second)

Gary



To: Jim McMannis who wrote (63299)8/25/1998 7:53:00 PM
From: Steve Porter  Read Replies (1) | Respond to of 186894
 
Jim,

Okay, we are getting into something that happened on the COMS thread:

USB = 12 Mbps

Mbps = Megabits per second

SCSI = 20+MBps

MBps = MegaBytes per second

as you know 1 Byte = 8 bits.. therefore

SCSI = 160+Mbps

Steve