Conrad has a Mac and he's having trouble with his hybrid hard drive. He's tried formatting and partitioning it using Disk Utility and he gets an "can't allocate memory" error. Leo says it sounds like a bad hybrid drive. The fact that it's a hybrid drive shouldn't matter because the hybrid part is handled internally by the drive circuitry. It should appear as a single drive to Mac OS X.
Here's an article Leo found on upgrading a MacBook Pro to a Seagate hybrid drive: http://purewebmedia.biz/article/2013/01/08/upgrading-macbook-pro-seagate-momentus-xt-drive.