ClipZip - USB Internal drive 'unformatted', but otherwise functional

[fellrnr]

My ClipZip has an odd problem - when I plug it into Windows, the internal drive shows up as 4GB of unformatted space. The microSD card works normally, and I can browse the internal drive from within Rockbox fine.

The other problem is I can't boot into the original firmware - it hangs on boot and I have to hold the power button down to do a hard reset.

Other than these two issues, the player works normally.

I've tried a couple of windows machines with the same result and I don't have a linux machine available at the moment.

I thought I could copy the original firmware to the SD card, then copy it using Rockbox to the internal drive, but I don't seem to be able to copy to another drive.

Any suggestions?

Jonathan