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Windows 7: USB stick - No drive letter allocated

27 Aug 2011   #1

Windows 7 Pro
USB stick - No drive letter allocated

Bought 3 Sandisk 2GB USB sticks for using on a floppy disc emulator. The emulator software effectively divides the USB stick into 100 virtual floppy discs. This I did on the first stick on my Win7 PC, where the USB stick was E drive, then I did something wrong (probably removed without 'ejecting') and all of a sudden the Win7 PC is not seeing the USB stick.
Disk Management within Computer Management sees the stick but when I try to allocate a drive letter I get the message "the operation has failed because Disk management view is not up to date......" refreshing & restarting as instructed does nothing. Trying it in safe mode is no different.

On my XP laptop the stick is seen OK and accepts files. the only difference I can see between the offending USB stick and another identical one is that there is 512 bytes allocated on the stick the Win7 PC sees whereas the offending stick is fully unallocated when reformatted (FAT).

I know its only a cheap USB stick but it must be something simple and I dont want to be defeated by the little so and so.

Any thoughts?

My System SpecsSystem Spec
27 Aug 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 x64

have you tried simply reformatting the stick on the xp machine and assigning a letter there?
you really should be using fat32 anyhow, compatibility is much better for fat32.

In fact I'm not entirely certain win 7 supports the ancient standard fat table.
My System SpecsSystem Spec
27 Aug 2011   #3

Windows 7 Pro

Yes. Tried formatting the rogue stick on the XP machine and it behaves (to me) normally - XP m/c sees it straight away, can format it, can transfer files to it, etc.
The sister stick is FAT and can be seen on both machines.
Putting the offending disk, reformatted FAT, in Win7 machine and its still not visible in explorer, but is in disk management, but cannot be allocated a drive letter.
Only difference I can see between the sticks (looking on the XP machine) is the 512 byte allocated on the sister stick.
My System SpecsSystem Spec

27 Aug 2011   #4

Windows 7 Ultimate SP1 64-Bit

Probably a long shot, but try formatting it as NTFS.
My System SpecsSystem Spec

 USB stick - No drive letter allocated

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