eDrive and Lion Recovery HD

In Mac OS X 10.7 (Lion), Apple has introduced the Recovery HD as a means to troubleshoot and reinstall the OS, similar to the install DVD for previous versions of Mac OS X. The Recovery HD may become unavailable, and does not include the functionality of TechTool Pro. Using a TechTool eDrive, you will have access not only to all of the tools in TechTool Pro be available (Volume Rebuild, Data Recovery, Volume Optimization, etc.), but you'll also have access to the Finder as well as several other Apple utilities.

Because previous versions of the Mac OS aren't aware of the Recovery HD, using previous versions of Mac OS X to make simple changes to the partition scheme on a hard drive containing Lion can destroy the Recovery HD. If you are using TechTool Pro 6 (version 6.0.3 or later) installed on your Lion volume, creating and removing an eDrive will occur normally. The Recovery HD will not be affected.  

If you are using a previous version of TechTool Pro, and have both Lion and an older version of Mac OS X installed, it is recommended that you upgrade or update to version 6.0.3 or later. Using a previous version of TechTool Pro to create an eDrive on a volume that contains Lion can remove a Recovery HD installed there. Version 6.0.3 or later, when used with previous versions of Mac OS X, ensures that the Recovery HD continues to operate properly by preventing any actions that might accidentally remove it, such as creating an eDrive. In this case, it is advised that the eDrive be created on a separate disk that does not contain Mac OS X 10.7 or a Recovery HD.