Sorry to be late in this topic but here is what I would have done to copy the old home directory:
Mounted the partition which had the old /home to /mnt
1. sudo mount /dev/device_where_old_home_is /mnt
2. cd /home
3. sudo cp -dpR /mnt/home/your_user .
4. sync && umount /mnt
One way to do it, which keeps the old files on the source drive saved
Mounted the partition which had the old /home to /mnt
1. sudo mount /dev/device_where_old_home_is /mnt
2. cd /home
3. sudo cp -dpR /mnt/home/your_user .
4. sync && umount /mnt
One way to do it, which keeps the old files on the source drive saved