How to restore a missing Recovery HD partition in Lion
When you install OS X Lion, the system will create a hidden partition called "Recovery HD." In addition to providing recovery and diagnostics tools similar to those on the older OS X installation DVDs, it is also used for enabling enhanced features in Lion such as Apple's FileVault 2 disk encryption and the "Find My Mac" location service as part of iCloud.
While this partition should be present on most systems running Lion, in some situations it may be missing. If you've installed Lion on a drive with too many partitions or an unsupported … Read more