Moving a file between volumes

[macdaddy at hash.com (Randy Croucher)]

Hello,

Is there a rename/move file call that will work across volumes?  Or do 
I need to determine if the two paths are on different volumes, and 
either call rename or some sort of copy and delete?  If I do need to 
copy and delete it, what calls would those be?  Has anyone already 
written a function to do this?

Thank you,
Randy