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Usb my lenovo laptop shows that usb is already connected to other

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Posted on Nov 12, 2008


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Panasonic CF-VDRRT3

Check your connections and cables. From the look of the thing it is designed to work from the USB port on a desktop computer, a laptop gives less power through the USB ports, this is why most USB powered devices for laptops have 2 USB plugs for connection.

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Have several Simpletech 250 GB drives. All are consistently recognized by my Lenovo laptop but one. That one problem drive will rarely get recognized about 1 in 200 tries on my Lenovo laptop. The problem...


You don't say how all these devices are connected at any one moment in time, whether you use a USB hub to plug multiple devices in simultaneously or whether your otherwise detailed and very good description of the background to the fault applies even when nothing else but the problematic drive is plugged into the laptop, or whether you use the same or different USB cables with the different drives and the different computers. It's worth eliminating a USB Port fault or a USB Hub overload or a USB cable fault as the potential causes of the problem, if you have not already done so.

USB is a relatively limited technology in Data Transfer Speed terms and is susceptible to Data bottleneck problems leading to read/write errors in external drives.

The Simple Tech case contains a controller card. The Simple Tech controller card may be faulty or failing due to an accumulation of such read/write errors and is probably not communicating well with the Lenovo's Operating System. Because of Temporary Files and Error Reports created whenever a read/write errors occur, The Lenovo 'remembers' the problematic drives electronic signature from the last connection and also remembers its response and therefore defaults back to the same reaction most times you connect the drive in question. The drive has no 'history' with the Dell, so no problems arise when it's connected there. The other drives might be mechanically identical, but the internal controller board of each has a different electronic signature.

The controller card has a chip on it that contains information in it that identifies what type of device it is to your operating system and then invites the Drivers for the device to start intermediating between the device and the operating system. Some error in the interface between that chip and the Lenovo is causing your problem.

It is purposeless to continue using the problematic SimpleTech Enclosure with your Lenovo Laptop. You have already alighted on the best, simplest and most practical solution -re-house the problematic drive in a good quality, well ventilated new enclosure. The controller in the Eagle case also has no 'history' with the Lenovo, hence the clean response.

For intellectual curiosity, you could swap the hard drives around in two of the Simple Tech cases to see what happens.

Also there might be a Firmware update for the problematic SimpleTech Case that might flash and overwrite the Controller card main chip. I am unable to check this for you as I would need the Drive's part Number. This is the relevant site:

I hope this helps.

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Sep 06, 2011 | SimpleTech SimpleDrive 250 GB External USB...

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Lenovo n500 laptop ... mouse pad not working

The mouse pad maybe faulty or the ribbon cable from the mouse pad to the motherboard may not be properly connected. Reseat this cable.
You can connect an USB optical mouse to the laptop. I prefer you use a USB mouse all the time over the mouse pad.

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If the webcam is built-in, try to download the approptiate driver for your webcam. Take note of the corresponding OS (operating system), you must download and install the driver according to your OS. Remove all webcam driver which is not provided by the manufacturer of your webcam, for it might conflict and coz malfunctioning.
In case your laptop was already formatted from its ORIGINAL state (factory set-up), browse on factory website (LENOVO) for its original bios. If all this things failed, it is more probably a hardware or webcam you must replce it. Please take note the model number of your laptop prior to download and intstallation.

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1 Answer

Usb port

idk about that one. i have never had a problem like that.

Jul 29, 2008 | Lenovo ThinkPad R51

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