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I have a Corsair Flash Voyager GT with capacity of 16 GB bought roughly 5 years ago. It was working okay on all my computers, like a flash drive usually does. One day I lend it to my friend and when he brought it back, he told me he could not get it working. After that I could not get it working on any of my Windows systems too.


  • The LED on flash drive doesn't blink;
  • The device is not present in Computer Management / Storage;
  • The device shows up under Other Devices / Unknown Device and Universal Serial Bus Controllers / Unknows Device in Device Manager;
  • Windows 7 also fails to find and install drivers for Unknown Device.

However, under Ubuntu 10.04 on my netbook, the flash drive is fully operational: I could easily back up data from it, format it (however formatting did not help to get it running on Windows). FYI the filesystem was NTFS, reformatted as FAT, so that's hardly the issue.

In addition, I tried to plug this flash drive into freshly installed Windows 7 x64 Ultimate. I read that it might be a driver problem. Unfortunately this was not of any help.

What can be cause of this? Given that the device is working okay in Ubuntu, I assume that the hardware itself is not damaged. And is there any way to fix it? If yes then how?

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Try GParted in Linux to delete all existing partitions on the drive (not just reformat) and then try it under Windows. Hopefully you'll get an option to initialize and format it, and then it should work. – Karan Apr 1 '13 at 9:56
@Karan played around with GParted, unfortunately it did not help. Pendrive is still "USB device not recognized". – Actine May 2 '13 at 12:50
Did you delete all partitions and then insert the completely unpartitioned/uninitialised/unformatted drive into the Windows PC? If the drive's still unpartitioned, try inserting it after running USB Oblivion on your Win PC (be sure to check the "Do real clean" checkbox). – Karan May 2 '13 at 14:46

We all have friends who don't tell us everything that happened to the things we lend them. Have you tried reformatting the drive with a windows tool like the HP Key drive tool?

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Your tool didn't install on my Windows 7 64bit environment. I tried HP USB Disk Storage Format Tool, but it didn't see my device. I will give it a try from Wine, but I doubt it will be helpful. – Actine May 2 '13 at 13:02

Happened the same to me. Try using gparted then wipe the flash drive without any filesystem. I then plugged in Windows and it worked and prompted to format to FAT32. I think that happened because I used the flash drive to boot a linux installation before.

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