I just installed 12.10, but can't find the
Disk Utility show as installed.
I even uninstalled and reinstalled it, but still can't find. The best I can find is
Disks, almost but no testing features.
The tool you're looking for is
Click on Dash Home type Disk Utility you will find the Disk Utility Icon, select it, will show Storage Devices connected to your system. Select any drive and will show you options like Check Filesystem , Edit Partition etc.