Copying one distro on a hard disk to another disk
My computer currently has 2 hard disks, one 120gb disk and 1 4gb disk. I have an old copy of Debian sarge installed on the 120gb disk, and a fresh, correctly configured copy of debian etch on the other (4gb). Is it possible to format the 120gb disk (after backing up files etc.) and copy across the the contents of the 4gb disk, and boot of this so I have more space?
Im sorry if this sounds confusing. The disks will be kept in the same computer, so all the hardware is the same. Is this possible?
Thanks for any replies!