Reparation de la cle usb

Bonjour,
impossible de formate la cle usb

j ai un problème sur ma cle Toshiba 16g PN: SK6211BB
les Références
Device Name: +[K:]+USB Mass Storage Device(GENERIC USB Mass Storage USB Device)

PnP Device ID: VID = 0930 PID = 6544
Serial Number: 001D0F1886A1C060F32708EA
Revision: 1.00

Device Type: Standard USB device - USB2.0 Full-Speed (USB1.1)

Chip Vendor: Toshiba(??)
Chip Part-Number: SK6211BB/TC58NC6686G1F

Product Vendor: GENERIC
Product Model: USB Mass Storage
Configuration: Windows 7 / Firefox 7.0.1