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Thread: USB 2.0 Speed

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    Uranium Lounger
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    Re: USB 2.0 Speed

    Phil,

    I found the following on a page about an external drive enclosure by Belkin.
    "Support for the USB 2.0 .... is universal in most modern operating systems. No driver installation is required for Windows ME/2000/XP or Macintosh OS X systems. Simply plug the USB drive into the computer and power up the device and the OS should automatically detect and begin using the device."

    There are software and hardware available to test the ports, but I haven't found anything <img src=/S/free.gif border=0 alt=free width=30 height=15> yet. I will post the pay for solutions if I can't find a free one. But I want to look around a bit first.
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    USB 2.0 Speed

    Hi Loungers:
    I just brought a new computer 3.2GHz, 480MB RAM (must be 512 with 32 allocated for the motherboard?), with both firewire & USB 2.0 ports. My question is about he USB 2.0. The transfer speed seems slow (see <post#=477621>post 477621</post#> & the surrounding posts) & when I connected my printer to the port, there was a message to the effect that I could get higher speed by connecting to a USB 2.0 port (which I thought I had).

    1. How can I tell if they are USB 2.0 ports? (Would something like SiSoft Sandra or Belarc show that?)
    2. How can I tell if they support a high transfer rate?
    3. Could there be something else, like the wrong controller, that could cause it to take 2-1/2 hours for a backup to a drive connected through a USB 2.0 port & only 15 minutes to the drive attached by firewire?
    Thanks in advance,

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    Uranium Lounger viking33's Avatar
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    Re: USB 2.0 Speed

    Hi Phil,
    Just a post to say that it doesn't look like either Sandra or Belarc or Everest, reports the type of USB support, just that a port is active or not.
    BOB
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    Re: USB 2.0 Speed

    Hi Phil,

    I've come across several systems that have both USB 1.x and 2.0 ports. That's to say that there are 2 USB 1.x ports and 2 USB 2.0 ports, for example. My current system has this.

    If you're receiving a message that the device is only connected at USB 1.x, then there is some bottleneck that is limiting it to USB 1.x rates. In addition to the port speed, I would also check the cable you're using to connect the device, and the speed of the USB Hub, if applicable.

    I had a USB 2.0 card reader connected through a USB 1.x cable and was limited to 1.x rates...

    By the way, the 32MB of "missing" RAM is allocated for your video card...

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    Re: USB 2.0 Speed

    Thanks to everyone for responding.
    Doc:
    The article seemed to indicate that there are USB 2.0 ports that don't support high speed transfer. Could this be the problem & do you know how I can check it?

    Bob:
    Thanks for the info on SiSoft & Belarc.

    Mark:
    I don't know how to bring up that message. I was told that I have 4 USB 2.0 ports in the back of the computer & 2 USB 1.1 ports in the front. I just know that when the printer was being installed (connected to the back), a message flashed briefly saying something to the effect that I could get more speed by using a 2.0 port.

    I looked at the cable, but there is no writing on the cable. It's just silver wires encased in a clear insulation & I don't have The external drive itself is a Bytecc ME-740 Series drive. The box claims it will get 480Mbps with a USB 2.0 port.

    I disconnected & reconnected the external drive to see if I would get the message, but I didn't. I also noticed something else that I don't know whether it makes a difference. When I click on the systray icon to "safely remove hardware" & then try to stop the drive, I always get the message that "the device 'generic volume' cannot be stopped right now. Try stopping the device again later." The only way I can turn them off is to shut down the machine first. So I'm left with these questions:

    1. Can I unplug something from the USB 2.0 port while the machine is running or will that ruin things?
    2. How can I check the speed of the port?
    3. How can I check the USB hub (or know if it exists)?
    4. I don't have anything to plug into the ports to try to bring up the message. Do you have any suggestions on how I should do this? Doc, I think you mentioned a thumb drive, but I don't know what that is.

    Thanks again,

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    Re: USB 2.0 Speed

    Phil,

    1. You can safely "hotplug" a device in or out of a USB post while running.
    3. If you go to Control Panel>System>device manager, you should see a list of items there including any active serial or parallel ports. Also there should be a line item for USB devices installed. Right click and click properties of each device will give you SOME information on each USB or active S & P ports.
    BOB
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    Re: USB 2.0 Speed

    Hi Doc,
    Not trying to break chops or anything but that blue text is almost unreadable on my "steel" background skin. Had to temporarily change the skin in order to read it.
    Please don't get "bent out of shape" about this. <img src=/S/grovel.gif border=0 alt=grovel width=31 height=23> <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15>
    BOB
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    Re: USB 2.0 Speed

    Phil,

    Here's one of the devices I mentioned for testing the USB ports. I'm posting it for reference and also because it has some good info on USB conections further down on the page. Now to your questions ....

    1. Can I unplug something from the USB 2.0 port while the machine is running or will that ruin things?<font color=red> With most devices it's not a problem, but I'd be careful with hard drives. It can cause data loss from what I've read. You can just let it sit for awhile and try later or select the specific device from the list before choosing "Stop"</font color=red>
    2. How can I check the speed of the port? <font color=red> So far all I can find is pay-to-play software and hardware. <img src=/S/shrug.gif border=0 alt=shrug width=39 height=15></font color=red>
    3. How can I check the USB hub (or know if it exists)? <font color=red>Device Manager</font color=red>
    4. I don't have anything to plug into the ports to try to bring up the message. Do you have any suggestions on how I should do this? Doc, I think you mentioned a thumb drive, but I don't know what that is. Thumbdrive <font color=red>is aka a USB Flash Drive.</font color=red>
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    Re: USB 2.0 Speed

    Not a problem Bob. <img src=/S/smile.gif border=0 alt=smile width=15 height=15> Always glad to provide an accommodation when requested. <img src=/S/bow.gif border=0 alt=bow width=15 height=15> I used blue to help keep Phil calm through this transition period. <img src=/S/grin.gif border=0 alt=grin width=15 height=15>
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    Re: USB 2.0 Speed

    First, thank you one & all. It turned out to be the driver for either the USB Composite Device or USB Root Hub. When I called the guy who built the computer, he said to try reinstalling the drivers. When I started to, I noticed a message that said AFTER installing the USB 2.0 drivers from the CD, you should update them using the Win XP drivers. I went through & tried to update every driver on the list (see attached), but only 1 updated. I forgot which of the 2 above. In any event, when I tested it by doing a backup that had taken 2-1/2 hours (see <post#=477696>post 477696</post#> & <post#=477621>post 477621</post#>), <big><font color=red>it now took only 10 minutes.</font color=red></big> <img src=/S/thewave.gif border=0 alt=thewave width=225 height=33> <img src=/S/thankyou.gif border=0 alt=thankyou width=40 height=15>
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    Re: USB 2.0 Speed

    Great Phil,
    Glad to hear you are running at top speed again. Shows you, TI is still an outstanding product.
    BOB
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    Long ago, there was a time when men cursed and beat on the ground with sticks. It was called witchcraft.
    Today it is called golf!

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