ok i was going to update my friends TOmtom XL.

Anyway in the past when i have updated the TOmtom's i have formatted them before i installed a new navcore on them.

Anyway this particular XL has 1GB but no Card slot,
So i Tried formatting it with windows,,,,, BIG mistake as it gave me an error and said it could not complete it.. ANyway now it is screwed, and i cant get into it without formatting it, but windows now wont.
I am running win7 so i am now trying to format it with command prompt... with admin rites. BUt i got the following error....

.

C:\Windows\system32>format
Required parameter missing -

C:\Windows\system32>format j:
Insert new disk for drive J:
and press ENTER when ready...
The type of the file system is RAW.
The new file system is FAT.
Verifying 980M
1926169 bad sectors were encountered during the format. These sectors
cannot be guaranteed to have been cleaned.
Invalid media or Track 0 bad - disk unusable.

No i dont know what to do... if i restart the tomtom i might not get it back right? Is there other software to format things? should i turn the gps off then back on.. DId i just brick my mates GPS? cheers.