Physical disk not showing up in Disk Utility

I'm in the process of selling my mac mini.
I went to the disk utility and erased per the instructions here:
http://support.apple.com/en-us/HT201065
The only thing I did differently was I adjusted the security settings to do a pass of writing zeroes.
Then I went to reinstall OS X per the instructions and there was no drive available on the "select the disk where you want to install os x" screen.
I tried to do a restore from backup and got the same symptom - no disk to restore to. Also doesn't show when I go to choose a startup disk.
I went back to the Disk Utility and noticed some weirdness:
- The Macintosh HD logical volume is showing in the upper left, but there's no physical disk showing as its parent! See attached screenshot - I can repair and verify the logical volume without any problems. It also says that the volume is online and has 1.1 TB as it should.
I've also tried resetting the NVRAM and PRAM, with no luck
Any help is much appreciated!!!

Hi PabloHoney1979,
When I check my Mac I see the same Macintosh HD, Logical Volume Group with an indented partition under it. So it looks like you are looking at the physical disk without a partition on it. Try the Partition tab and create a partition on the drive.
Disk Utility 12.x: Partition a disk
3. In the Mac OS X Utilities window, select Disk Utility, and then click Continue.
4. Select the disk that you want to partition and click Partition.
5. Choose the number of partitions from the Volume Scheme pop-up menu.
6. Click each partition and type a name for it, choose a format, and type a size. You can also drag the divider between the partitions to change their sizes. If a partition’s name has an asterisk beside it, it’s shown larger than its actual size in order to display its name clearly.
7. If you’ll be using a partition as a Mac OS X startup disk, click Options, and choose the the GUID partition scheme.
8. Click Apply.
Take care,
Nubz

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