Dell usb ports

[dougmack]

Computer:  Dell Inspiron 6400/E1505, s/n 8488KB1. lspci -v shows 5 usb ports, only one of which is usb2. There are only 4 usb jacks on
the computer, 2 on the right side, 2 on the back.  If one of these is usb2, then how do I find out which?  If not, then where is the usb2 port?
The first 4 ports are called UHCI, the fifth is called EHCI. (In addition to lspci, a file called "myhardware.txt" found on an U****u install on the
same machine also shows 5 usb ports, one usb2, with the same UHCI/EHCI notation.)

Thanx--doug

[T6]

one way to discover the maximum speed of a port, in this particular case is to copy files to a usb drive, most of them will let you copy files at 10 to 20 mbps

the usb 1 or 1.2 will only let you copy at 1 or 1.2 mbps

the usb 2 will allow full speed

if the machine is very old, the usb pors should be only in the mack of the machine, near the ps2 keyboard

if you can't find them, it might be possible that the board was designed to put a extra usb 2.0 port at the back, you can buy those, very cheap parts, like this one



the problem is that if it is old, the connectors in the mainboard could not be standard, so the order of the 4 cables could be wrong and whatever you connect in there won't work or can end damaged

[jlf001]

If I recall correctly the E1505 that I use to have had four USB 2.0 ports.  The Card reader used USB 1.1.  See the following specs:

http://support.dell.com/support/edocs/systems/ins6400/en/om/specs.htm#wp1073078

Jeff

[dougmack]

Reply to jlf001:  I looked in the specs in back of the Owner's Manual, and sure enough, it says 4 usb2 compliant ports.  I don't know why
the Linux software--two different kinds--identifies them as usb1.  Now I have to see if I can figure out how to measure the transfer speed
of a file or directory to a thumb-drive, as  T6 suggested.  How would I go about that?  cp --help does not show any option for determining
copy speed.  (The is no man cp.) BTW, T6, this is a laptop, so the dongle you pictured is not usable.

So I'll measure.  Is there a faster and more accurate way than a stop-watch?

--doug

[T6]

sorry, i was sure it was a desktop

kde4 has a information screen showing speed of the data transfer and time used

[dougmack]

Can't find KDE4 info center that shows speed of operations.  Running 4.6.4. How do I access that?  --doug

[AS]

How does USB 2.0 and 1.1 work together?
You may have heard that USB 2.0 is "backward-compatible" with USB 1.0/1.1 (Full-Speed USB). While that's true, USB 1.1 is also forward-compatible with USB 2.0. Whenever a system has USB 2.0 ports, you'll find the "Enhanced" USB controller in Device Manager, but you will also find two other USB controllers.

These two to mantain backward compatibility to USB 1.1 devices. Each USB 2.0 host actually has 3 chips onboard. The USB controller routes signals to the correct controller chip depending on how a device is recognized. Where a device is physically plugged in has no bearing on how it is routed. All ports on a USB 2.0 motherboard can host any USB devices at all as long as the system and devices are healthy.

http://www.everythingusb.com/usb2/faq.htm

[T6]

in the taskbar, i have the widget loaded just beside the clock

the "i" should spin when the process begins, click on it and it can show you simple and advanced information