on 6/10/05 8:28 AM, Brian Christmas at [EMAIL PROTECTED] wrote: > G'day from Oz > > I bought a 1 Gig thumb drive on eBay, advertised as high speed usb 2. > > In reality, once it arrived, it takes 45 minutes to transfer 1 Gig. I > calculate that equates to 2.8 Mb/s, or about double usb1 rate. > > The seller has offered to swap (I posted negative feedback), but I > want to know what a realistic time is to transfer 1 Gig at full usb2 > rates. At 480Mb/s it should take 17 odd seconds, but is that > practical? Is there anybody with a usb2 thumb drive can advise please? > > TIA > > Santa
the 480Mb/s rate in USB 2.0 is called high speed USB. You'll never get actual data to transfer at that rate due to lots of overhead in the data packets. USB 2.0 is backward compatible and includes the two rates specified in USB 1.1. Low speed USB is 1.5Mb/s and is primarily for keyboards and mice. Full speed USB is 12Mb/s. My guess is that the thumb drive is working at full speed. Note the hit in transfer rate due to overhead. A device can be USB 2.0 but not be high speed USB. Rick -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
