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Windows 7: Unable to detect USB flash drive after mounting windows 7 ISO


13 Dec 2012   #1

64 bit
 
 
Unable to detect USB flash drive after mounting windows 7 ISO

So I was using my USB flash drive to mount Windows 7 since I don't have the CDs and easier to use USB flash drive. Anyway after I helped my friend download Windows 7 on his PC, I wanted to use my USB for storage again. Unknowingly, I removed the Windows 7 IMG with DAEMON tools lite and now I am unable to see the Flash Drive in My Computer. Also In Disk Management the USB is shown with 0 MB of space available. I also tried restarting pc, remounting another ISO(when I initially though daemon removed the first ISO) and using the USB on a laptop, but still no luck.

tl;dr: Mounted flash drive with Windows 7 ISO, afterwards "deleted/removed/demounted" ISO with Daemon(doesn't work) now Flash Drive keeps acting as a driver being installed everytime it's plugged in. (it has windows 7 ISO in it)

Additional Info:
Windows 7 64-bit
FlashDrive: Corsair MiniVoyager 32GB USB2.0

If you need anymore info let me know.
Thank you for your time!

Edit: Added screenshot on cleaning through cmd
Edit2: Added screenshot of USB flash drive's location. it's currently recognized as a disk drive.




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My System SpecsSystem Spec
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13 Dec 2012   #2

Windows 7 Home Premium 32 bit
 
 

Hi Simon2020,

Welcome to SevenForums.

A drive letter conflict?????????

Did you try changing the drive letter? If not check whether you can assign a different drive letter say Z to the pendrive.

If it is indeed a drive letter conflict, this simple solution will most probably fix it.

Switch off your machine. Plug in the problem pendrive and boot with the pendrive plugged in. Does your pendrive show up now?
My System SpecsSystem Spec
13 Dec 2012   #3

64 bit
 
 

Hello Jumanji,

Thanks for the warm welcome and I have already tried changing the drive letter. However I forgot to mention something in the Original Post. The flash drive has the windows 7 ISO so atm whenever i "uninstall" it and then replug the flash drive a dialog box pops up stating that device is installed.
My System SpecsSystem Spec
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13 Dec 2012   #4

Windows 7 Home Premium 32 bit
 
 

Without going into the details as to how, why and what ( about which I am really confused in your case ) and maintaining the focus on the fact that you now want to regain your flash drive as a normal flash drive, I would suggest

1. Try to Low Level Format your flash drive with HDD LLF Low Level Format Tool v4.25 - Windows executable version that does not require installation - HDDGURU: HDD LLF Low Level Format Tool

2. If the above was successful, do a regular full format with HP USB Disk Storage Format Tool 2.2.3 Download HP USB Disk Storage Format Tool 2.2.3 Free - Windows-based Format Utility for HP Drive Key or DiskOnKey USB Device - Softpedia . ( You have to run it as administrator)

That should sanitise your pendrive of any accumulated dirt.

Honestly, I do not have confidence in your machine with Demon () tools and suggest that you do this on any other PC that doesn't have it.

Let us see whether it works.
My System SpecsSystem Spec
14 Dec 2012   #5

64 bit
 
 

I just tried both method and no luck. The first one didn't detect the 'broken' flash drive at all and the second one while able to detect it was unable to reformat it. I am still able to boot from flash drive and install it as if Windows 7 was still on it; however, as far as being able to reformat it back to storage use or even accessing it, no luck. I am just about ready to give up on the flash drive, maybe keep it as a Windows 7 Download flash drive should I ever need to re-install for any upcoming upgrades. Thank you for all your help though you have given me two new tools to play with. As far as Daemon Tools, I never did get the chance to actually use it, it was a program a friend recommended that I have.

screenshots for #2:


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My System SpecsSystem Spec
14 Dec 2012   #6

Windows 7 Home Premium 32 bit
 
 

That is bad luck indeed.

Usually the device is identified by the brand name and capacity like for example "SanDisk Cruzer Micro 8.02 (7664MB) (I:\)" ( That is how my 8GB SanDisk pendrive is identified by the HP Tool)

From the moment I saw the peculiar device nomenclature, I was thinking whether it could be due to a corrupted firmware in it. Was this the way your Corsair Mini Voyager appeared before?

I am also curious to know which program you used to create the bootable Windows Installation pendrive. ( you have been speaking about Daemon Tools and I have not heard of Daemon Tools creating it.)

Pendrives have to be treated as disposable devices and from that point of view one shouldn't be worrying about it endlessly.
My System SpecsSystem Spec
14 Dec 2012   #7

Windows 7 Home Premium 32 bit
 
 

My assumption seems to be correct - firmware corruption.

On further research, I came across an obscure software URescue v 1.3.0.71 which seems to rewrite the firmware.

Support Question OCZ Diesel USB 2.0 Flash Drive Dead then Alive [Archive] - OCZ Forum

If within warranty, you may get a replacement from Corsair.

If for any reason you do not want to do it you may try the URescue (at your own risk. )

I also found it repackaged here. Repair a Pen Drive (usb drive)
My System SpecsSystem Spec
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 Unable to detect USB flash drive after mounting windows 7 ISO




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