usb pen blocked after using dd

[Emmanuel Wilhelm]

Hello,

I installed Niblex on a usb pen (Transcen Jetflash 16Go). It follow the
howto, but it doesn't work (The Grub stage 2 was unable to load).
But now, I can't access to the key and parted is unable to find the main
partition. There are just 512b which are visible.

On Ubuntu forum
http://forum.ubuntu-fr.org/viewtopic.php?pid=1290402#p1290402
I receive the following post:

 Re: usb key disapeared

sudo dd if=/dev/zero of=/dev/sdx (take a while and wipe everything)

sudo mkfs.vfat -F 32 /dev/sda

The key is on /dev/sdh, but when I did the first command, I receive the
message:


dd: writing to `/dev/sdh': no free space on the device
2+0 red recordings
1+0 written recordings
512 bytes (512 B) copied, 0,00164514 second, 311 kB/s

Is my key hs or have I a hope to solve this problem?

Regards

Emmanuel Wilhelm