|Back up all the data to the XP machine then format the Iomega, |
see if it's recognised by the Vista machine, format it again using
Vista and if all ok then put the data back on it.
By the way, has the Vista machine had SP1 installed? - one of
the 'improvements' was the way that it handled large drives.
"I've always been mad, I know I've been mad, like the most of us..."