Have you received the error "The disk is write protected"
I've come across this error when cloning a volume snapshot from our Equallogic SAN. To overcome this issue and allow the drive to be usable again you must clear the readonly attribute of the disk.
1. Open a Command prompt by clicking Start,
typing command, and clicking Command
Prompt.
2. Type diskpart and press Enter.
3. Type list volume and press Enter.
4. Type select
volume #, where # is the number of the drive that's giving you
the "write-protected" error
5. Type attributes
volume clear readonly and
press Enter.
6. Type exit and press Enter.