If you try to restore the software on a smaller partition, you'll see this message:
"Restore Failure
An error (-20) occurred while copying
Not enough free space on the partition"
Disk Utility's First Aid feature may also find "problems" on the partition you restored the software to.
To restore the software,
partition the drive with at least one volume that is 11 GB or larger.
Warning: Partitioning a disk erases all information on the entire disk.