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My computer does not realize i plugged in usb

December 10, 2010 at 21:25:00
Specs: Windows 7, 4GB

Hi,

Since last week my computer or any other for that matter does not realize that i inserted my two usb drives. They are both 4gb from Lexar and i sent one in to a tech wizard and he dismantled it to realize that it was a lost cause so I had to chuck it. The second one lasted a little longer until it bailed one me too. Usually when i insert it in a computer it turns red when it works however now when i plug it in to any computer nothing happens on the computer or the usb. I am a hundred percent sure that it is not due to a USB port failure as i have checked all four of my drives with different devices and they work. The drive contains all my school work and very important files such as my cv and university applications therefore it is essential for me to be able to access it. I thought it might be corrupted because i ejected it a few times without removing safely but usually when a drive is corrupted doesn't it still show up in my computer? This one doesn't light up, show up or stimulate any activity :P I bought both these usbs in germany and im now living in malaysia therefore i cant send them back to thew company.

TIA


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#1
December 10, 2010 at 21:45:43

"I bought both these usbs in germany and im now living in malaysia therefore i cant send them back to thew company"

No mail service in Malaysia? 4GB jump drives sell for under $10, so it's probably not worth the effort anyway. Besides, you don't have to send them to Germany, you just have to send them to Lexar.

http://www.lexar.com/support

Jump drives are not reliable storage devices. If you tried your drive on several different systems & it doesn't work on any of them, it is most likely fried & your important docs are lost. If you don't have backups of your work in another location, you just learned a valuable lesson.


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#2
December 11, 2010 at 06:45:57

Flash drives are the least reliable of modern storage media and should not be trusted for long term storage of important data. If possible you should have a copy of all data on a different storage media, such as the HD of a computer. If the data is of particular importance more than one copy, in a different location, would be a good idea.

Even good quality drives fail, often without warning or apparent reason.


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#3
December 11, 2010 at 06:47:17

Hi mickliq

thanks for the quick response. I realize that these drives are cheap and break easily i just wanted to know if there was any way of getting back my documents. But thx for the info, i know what i have to do now.


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Related Solutions

#4
December 11, 2010 at 07:30:24

"I thought it might be corrupted because i ejected it a few times without removing safely but usually when a drive is corrupted doesn't it still show up in my computer?"

Not using Safely Remove Hardware and STOPing accessing the drive while Windows is running before unplugging a USB connected drive is a frequent cause of problems like yours.
Depending on what data was damaged, it might not show up in My Computer in XP or lower (Computer in Vista and Windows 7), or Windows Explorer, but it should show up in Device Manager - USB controllers as a Mass storage device, and in Device Manager - Disk Drives
(Device Manager in XP or lower - RIGHT click on My Computer - Properties - Hardware - Device Manager
Device Manager in Vista or Windows 7 - double click on Computer - on the top bar click on System Properties - link to Device Manager on the left side.)

If the drive doesn't show up there, you probably need to connect the drive to a different USB port.
If the drive DOES show up there, you need to use a program to repair the data damage.

Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:
http://www.computing.net/answers/ha...

Check that out first.
......

Rarely, not all the ports on the back of a desktop case may be able to supply 500ma each.

If you have a desktop computer, Note that I answered a Topic on this site recently where a guy had an external drive, which does require the full 500ma, connected to a port on the back of a desktop case - it would not work properly when a webcam was in the port next to it, but it worked fine when the webcam was unplugged. Ports on the back of a desktop case often have two ports connected to the same USB controller module that are ports one above the other - you could try connecting the cable to one of those and leaving the other un-used.
......


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#5
December 11, 2010 at 17:31:49

Hi tubes and wires,

thx for the reply. I have a laptop with windows 7 and when i plug in my usb to any of my ports nothing happens. In my device manager there are like 8 usb mass storages :P And i know my usb ports arent deficient since i plug in my hard drive ipod and mouse in all of them and they all worked. Ima try the suggestions in the topic u posted.

TQ


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#6
December 11, 2010 at 21:25:13

Usually the flash drive isn't damaged - after you have repaired the data damage it works fine.

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#7
December 13, 2010 at 07:07:00

Thx for the help but i dont think u understood me properly.

Like i plug in my usb and its not recognized at all so doesn't show up in devcie manager disk management or my comp. there is no sign of it at all when i plug it in not even my cursor turning for a while. its as if i hadn't plugged anything. and its not my ports as i have tested all of them and they are functioning correclty. I know ive probably lost all possibilities of getting back my data. i just wanted to know if there was anyway of getting my disk out of oblivion.


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#8
December 13, 2010 at 08:32:51

See the info I provided at the link in response 4 and the other info in that response.
USB devices DO NOT necessarily work in all USB ports.
Your device is dead ONLY if it doesn't show up in Device Manager under Disks or USB controllers as a Mass storage device if it's plugged into a port I specified it should work fine in.

I'm assuming, of course, that other USB devices work in the same ports, and that you don't have a desktop computer that has the IRQ sharing problem.


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#9
December 13, 2010 at 18:49:03

I have a laptop with win 7 64 bit 4gb ram and all ports functioning with no irq sharing problem whatsoever. I think my usb just fails to spark up anything when i plug it in to my comp. nothing moves, changes, lights up, or causes something. the usb is not found in disk management or device manager. All i have in device manager is like 8 different usb mass storages. I hope that clarifies a bit more.

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#10
December 13, 2010 at 21:45:57

When it's data is damaged, it may be possible a flash drive (or external drive, or memory card) will show up as drawing current in the Root Hubs yet there is no listing for the drive in Device Manager - Disk Drives.

Windows assigns USB Mass Storage Devices to certain devices data can be stored on, when it detects them of course - external hard drives, flash drives, slots in a card reader (will show there even when there are no memory cards in them; one slot may support more than one card type, a listing for each type), other devices that can store data, such as cameras, iPods, mp3 players.
There is no info in the Properties for the USB Mass Storage Devices that names what they are, but you can look at the info in the USB Root Hubs.

Mboards that have USB 2.0 controllers have USB Root Hub listings for both their USB 2.0 support and their USB 1.1support - all USB 2.0 controllers also support USB 1.x standards.

The USB 2.0 controller support is shown as a ........ Enhanced , or similar, Host Controller (it usually has no 2 in it's label)
(if that's not there, the mboard's main chipset drivers have not been installed)
The USB 1.1 controller support is shown as Standard .......... USB Host Controller

There is one Root Hub listing for each controller listing

Usually there's only one, or two, USB Root Hub listing(s) for 2.0 support, and many for USB 1.1.

When you look at the Properties (double click on it) of the USB Root Hubs for USB 1.1 support, when you click on the Power tab, usually only two, but sometimes 1 or 3, USB ports are available - I've never seen more than 3.

When you look at the Properties (double click on it) of the USB Root Hubs for USB 2.0 support, when you click on the Power tab, more than 2 or 3 USB ports are available.

The total number of USB 1.1 ports in their Root Hubs = the number of USB 2.0 ports in it's (in their) Root Hub(s) - they're the same ports - the physical ones on the back of the case on a desktop, or the physical ones on a laptop, plus the ones available on the mboard via a USB header whether you have anything connected to them or not - most desktop computers have at least two hooked up to a header on the mboard for the front USB ports, some computers have a memory card reader hooked up to a USB header.

When you click on the Power tab in the USB Root Hub properties, if USB device is detected
- if Windows has been "told" the device works better with USB 2.0 support, it is listed ONLY in the Root Hub for the USB 2.0 support
- otherwise, a device is usually listed ONLY in one of the Root Hubs for USB 1.1 support, although a memory card reader may show up in both (identical ma).

There may or may not be a label that tells you what the device is more specifically for the ones that are plugged in, but usually a mouse or a keyboard is identified as such.

- the ma (milliamps) it's drawing is shown
- usually less than 10ma - a flash drive, or a printer when it's not doing anything
- more ma up to ~100ma - a mouse
- on my computer, a removable memory card reader is drawing 100ma, in both a USB 1.1 Root Hub and a USB 2.0 Root Hub - when I use Safely Remove Hardware to STOP accessing it, then unplug it, both 100ma entries are gone.
- 500ma - always an external hard drive, or an external optical drive - they require the full max 500ma (if the port it is plugged into can actually supply 500ma, of course)

Look at the Root Hub listings when the flash drive is plugged in, and when it's not - if you see a ma reading for a Mass Storage Device that goes away when you unplug it, the flash drive is probably working okay - you need to use a program to fix the data on it.
(Either go out of Device Manager, go back in when you change what's plugged in , or click on Refresh in the Power list window.)

Other clues, but I don't know if you'll see this if the data on the drive is damaged -
when you click on the Safely Remove Hardware, then click on STOP for a device, the text may specify what the device is.


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