If your Mac OS X v10.6 startup disk is a software RAID volume


Copy the "Install Mac OS X Lion" application from your Applications folder to another disk that is not part of a software RAID. You can use another internal volume (if one is available) or an external drive, such as a USB flash drive. Double click the copy of "Install Mac OS X Lion" on the non-RAID volume to start the installation.


If your Mac OS X v10.6 startup disk is not a software RAID volume
Verify that you are not attempting to use a copy of the "Install Mac OS X Lion" application that resides on a software RAID volume.