dual boot - Preparing a partition on which to restore a disk image using gnome disk utility

I have recently created a partition image of an HFS+ partition which contains a time machine backup. I used Ubuntu Disks (gnome-disk-utility) to create the partition image. I am now wanting to restore the partition image to my external HDD. There are no available partitions on the HDD, only free unallocated space.

The disk utility does not allow me to restore the image into unallocated space. So I need to make a new partition before restoring the image. As far as I can see, gnome disks does not allow one to make a new partition without formatting it with a filesystem (ext4, HFS+ etc).

1. Do I need to format the new partition with the same file system as the original backup (HFS+)?





2. If I make the partition bigger, does the restored filesystem have access to the additional space in the partition?

Thanks in advance