pen drive not recognizing

September 25, 2009 at 03:49:39
Specs: Windows XP
hi iam bharath
when i connect my transcend pen drive it is displaying "usb device not recognized" and it is not showing in disk management please any body help

See More: pen drive not recognizing

Report •


#1
September 25, 2009 at 06:41:25
Change the USB port

Report •

#2
September 25, 2009 at 11:33:04
USB devices may not work correctly when they're connected to certain USB ports, e.g. ports in a hub or on the front of a desktop case.
See response 3 in this:
http://www.computing.net/answers/wi...

Report •

#3
October 10, 2009 at 04:50:54
yes i checked with different systems but no change i sure problem with pen drive but it recognized by system as found new device and showing balloon message as " one of the usb device attached to this computer has mal functioned and windows doesn't recognized it " any body help what it may happened

Report •

Related Solutions

#4
October 10, 2009 at 10:06:54
The data on the pen drive may have been damaged. It's quite common for people to do that. In that case, if there's nothing wrong with it physically, it still shows up in some places in Windows but it does not show up in other places where it normally does.

Make sure you have the pen drive plugged into a USB port it should work fine with according to the info I supplied.

If you have the sound on, you should hear a sound indicating a USB device has been plugged in when you plug it in, and a similar sound when you unplug it.
If you don't hear that sound, if you don't have a desktop system with an IRQ sharing problem (see the info I supplied above) the the pen drive is probably physically damaged - throw it away.

Go to Device Manager - open up USB controllers.
(e.g. RIGHT click on My Computer - Properties - Hardware ,,,, - Device Manager )
There should be an entry there for a USB mass storage device for the pen drive when the pen drive is plugged in. When you unplug the pen drive while looking at that, Device Manager will refresh itself, and when you look under USB controllers again, the USB mass storage device entry for the pen drive is gone.

Click on the Root Hub entries, then Power
One of the devices listed should be USB mass storage device and the current it is using when the pen drive is plugged in. Sometimes there's additional info - e.g. the brand of flash drive.

If you have more than one USB mass storage device listed, that can be for other flash drives, memory card readers, or external drives.

If you see no USB mass storage device for the pen drive listed when the pen drive is plugged in, or if you do but the current is zero, then the pen drive is probably physically damaged - throw it away.

Go to Go to Device Manager - open up Disk drives.

The pen drive should be listed there when it's plugged in, and not be listed there when it's not plugged in.
If you DO NOT see entry for the pen drive listed when the pen drive is plugged in, then the pen drive is probably physically damaged - throw it away.

......

If you DO see the pen drive show up properly in all three places, then you can attempt to repair the data damage.

Testdisk - get the Stable version:
http://www.cgsecurity.org/wiki/Test...

Glary Undelete:
http://glary-undelete.en.softonic.com/

PC Inspector (freeware)
http://www.snapfiles.com/get/pcinsp...

Zero assumption Recovery
http://www.z-a-recovery.com
The demo is limited
It will only recover 'up to' four folders per run
But you can make multiple runs
......

The data on a flash drive, memory card, or on an external drive, is usually damaged as a result of you NOT doing the right thing when you unplug the device while Windows is running.
You are supposed to click on the Safely Remove Hardware icon in your taskbar lower right, and choose to STOP accessing the device you want to unplug BEFORE you unplug it, if Windows is running !
(You can unplug it at any time when the computer is not running.)
In XP and 2000 the Safely Remove Hardware icon is a grey rectangle with a bright green arrow over it. In Vista and probably Windows 7 it's a mid green circle with a white checkmark on it. It may be hidden - in that case, you need to click on the < at the left end of the taskbar icons to reveal it.
If you were accessing the device just before you click on the Safely Remove Hardware icon, you may not be allowed to STOP accessing it. In that case, access some other drive letter, then click on the Safely Remove Hardware icon, and then you WILL be able to STOP accessing the device.


Report •

#5
October 13, 2009 at 03:28:11
Thanks for your reply yes i checked what you said it is detecting in device manger when I connected as unknown device some times it recognized as pen drive and showing data in pen drive but mostly it showing as usb device not recognized {one of the usb device attached to this computer has mal functioned and windows doesn't recognized it}
but when it detected I checked inside data of pen drive its contain two hidden files of " bfucr" notepad file and ,"autorun.inf" file I tried so much time to format it but no use it saying as this drive using by other process finally I did by some hard work after tht again appearing on pen drive .after that I removed pen drive for virus scanning in another system again it displying as unkwon device same thing append in my system also when ever I am trying same thing happend repetedly first I need to clarify tt problem is with virus to prevent pen drive to recognized by pc or pen drvie hard ware problem to detecting I tried a lot from my side as per I know and IIf plese hlep me to how can I come out this problem



Report •

#6
October 13, 2009 at 08:52:51
"...some times it recognized as pen drive and showing data in pen drive but mostly it showing as usb device not recognized..."

Whatever port you had it plugged into, it should be detected consistantly (every time) as one or the other of those.
See response 2.
It must be plugged into a port it will work properly in according to that info.

If it's inconsistant in the same port (sometimes detected, sometimesunknown) that's probably caused by a poor connection - e.g. a damaged USB port that has it's outer metal shroud bent out of shape such that it's too big, or the USB plug portion of the pen drive is bent out of shape, either of which can cause the pen drive to be too loose in the USB port.If the pen drive is not loose in the port, then the pen drive is probably physically damaged.


"...but when it detected I checked inside data of pen drive its contain two hidden files of " bfucr" notepad file and ,"autorun.inf" file...."

autorun.inf is normally not a hidden file.
It normally contains info that tells Windows to run some program when you first plug in the drive. If the program it wants to run is not on the pen drive, or not on the hard drive in some location it refers to, nothing happens.

I searched the web using: bfucr
There's absolutely no evidence it's malware (a virus or whatever) , and if it's a file that can be read by notepad, it can't be malware program in any case.

"....I tried so much time to format it but no use it saying as this drive using by other process "

"...this drive using by other process "

You probably created that situation yourself.
You can't access the pen drive with two things at once in Windows, or two instances of the same thing. Exit or Close all programs you used to access the drive except the one you are trying to use. .

If you don't care about whatever data is on the pen drive, and you just want to make it usable again...

If you want to re-format it, either
- use Disk Management,
(Control Panel - Administrative Tools - Computer Management - Disk Management),
RIGHT click on the pen drive, select Format

or RIGHT click on the pen drive in My Computer and select Format

If you can't Format it, or if it does not show up in Disk Management or My Computer,

OR - if there is data on the pen drive you would rather not lose, then you can attempt to repair the data damage, by using one of the programs I listed in response 4.
........

You can re-format the pen drive in Windows, but can't Delete the partition or partitions on the pen drive in Windows by default.
You may be able to do that with one or more of those programs,

or see this - use the Lexar flip removable bit tool

Multi Partition a USB Flash Drive in Windows
http://www.lancelhoff.com/multi-par...



Report •

#7
October 14, 2009 at 06:47:41
Hi
Thanks for your reply's I cheeked all the ways what you said what I observed when I am connecting pen drive is giving detecting sound and removal beep also there is no problem ,it is detecting in device manager when ever i am connecting as unknown device under universal serial bus controllers and in system tray first it showing as usb device with in 4 seconds showing as" unknown device" or " one of the usb device attached to this computer has mal functioned and windows doesn't recognized it" it also not displaying in disk management . I got some information about this pen drive when it detected I am sending that information for you
=====
Device Name : Mass Storage Device
Description : JetFlash Transcend 4GB USB Device
Device Type : Mass Storage
Connected : Yes
Safe To Unplug : No
Disabled : No
USB Hub : No
Drive Letter :
Serial Number : NSZTLS5N
Created Date : 10/11/2009 7:42:51 PM
Last Plug/Unplug Date: 10/11/2009 7:42:59 PM
VendorID : 058f
ProductID : 6387
USB Class : 08
USB SubClass : 06
USB Protocol : 50
Hub / Port :
Computer Name :
Vendor Name :
Product Name :
capacity is 4GB

and when system identifying as" unknown device " it showing beleow information

=====
Device Name : USB Device
Description : USB Device
Device Type : Unknown
Connected : No
Safe To Unplug : No
Disabled : No
USB Hub : No
Drive Letter :
Serial Number :
Created Date : 10/11/2009 5:13:50 PM
Last Plug/Unplug Date: N/A
VendorID : 0000
ProductID : 0000
USB Class : 00
USB SubClass : 00
USB Protocol : 00
Hub / Port : Hub 0, Port 6
Computer Name :
Vendor Name :
Product Name :

but one thing I am sure that no problem in ports a why i am saying I connected second pen dive its working fine
but only problem with this pen drive only i agree that problem with loses contact between pen drive but it detecting in system but I am not greeting how to access it

one thing let me know when I connected it showing device manager as unknown device and in system tray also then can we confirm as physical damaged or else problem with os with drivers computability for recognizing this device I got same resolts of my friends computers they also having xp -sp2 os and I also reinstalled USB Drivers for my pc scaned with anti virus but no result what I expected i need to tell one thing for you today I tired one software for formatting device when it detected using portion usb software I try to format in middle is displaying as unable to format I am expecting that correction of file system or un proper drivers for detecting pen drive
there is any proper method for software for detecting unknown devices and reading for corrupted file system devices if I said what ever I said as for my knowledge and understand by your replys if there is any solution plese tell me


Report •

#8
October 14, 2009 at 07:21:37
If another pen drive or another USB flash device works fine when plugged into the same USB port, then obviously there is nothing wrong with the USB port or it's wiring or the USB drivers. The same built into Windows USB drivers for the ports are used for all USB devices.
The only thing that can be wrong in that case if you are randomly getting alternately unknown device or it's recognized properly is the subject pen drive is physically damaged - probably the USB plug part of it that plugs into the port.
You could try doing something such as gently pressing down or up on it when it's plugged in, but that may not help.

You have to be able to get the pen drive to be recognized properly if you want to retrieve data from it or if you want to repair the data on it if you can't access it like you could previously. You can't do anything when it's detected as an unknown device.
When it is detected properly, if the data on it is damaged, it may not show up in My Computer or Windows Explorer or Disk Management, but it should show up as a mass storage device under USB controllers and as a drive in Device Manager if there's nothing physically wrong with it. You may not be able to format it if it's partition data is damaged.


Report •


Ask Question