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How can I test to see if my USB 2.0 ports are detecting my USB 2.0 devices properly? For example: I have a USB 2.0 flash drive that works in USB 1.1 mode, but I want to make sure that when it is connected to my machine which has USB 2.0 that it is running at top speed. Thanks for your help!
I don't know how you measure it, but if it's a USB 2.0 port with USB 2.0 controller, and a USB 2.0 device it should operate...."up to"....USB 2.0 spec. Whenever zippiness is quantified among computer devices I think it wise to to never expect maximum ability at all times. Your actual mileage varies of course with what ever else your computer is doing at the time. And of course your CPU and chipset can only do so much at once. Figure the phase of the moon and other esoterica and you can estimate something reasonable.
I'm transfering files to my external hard drive right now. Every file is 3MB - 8MB and the rate of transfer appears to be about 2-4 files per second. So is this USB 2.0 performance?
Hard to tell, as I've noticed that on some USB drive it only writes the data after you unmount (or "eject") it. Especially on LG drives, no problem though with Kingston.
As for finding out the actual speed, have you searched google yet? I'm sure there is a lot of info on this.
Remember that just because something is USB2.0 does not mean it will necessarity run high speed (480M). The are plenty of 2.0 devices that will only run full speed (12M). As far as I understand it, USB 1.1 to 2.0 was the possibility to run at 480M and some protocol changes.
Thank you for the clarification. My USB 2.0 hard drive and USB 2.0 flash drive are performing nicely so I have no complaints.
On a semi-related note, my dad had a USB 2.0 PCI card installed in his WinXP machine. Though his printer is plugged into the new USB 2.0 port, he is still receiving a message saying that if the device was plugged into a USB 2.0 port he would have better performance. Of course, the printer IS plugged into a 2.0 port. What's the deal?
BTW, if my dad has any more WinXP issues.....I'm installing Ubuntu on his machine next time I visit them in NY.
Another thing that can kill your usb 2 hard drive performance
is if the mount is setup to be synchronous. I have
a large usb 2 disk formatted as an XFS volume. I was
noticing even rather small files were very slow to
copy. The drive icon showed that checkbox "synchronous"
was checked, after putting that off the speed got much