If the system doesn't boot up (it was due to this issue), is it better to reinstall OS X Lion, or restore from a Time Machine backup?
I do see a Time Machine backup from 3 AM last night, so if that is used to restore the machine, will it read all 600 GB from the external backup drive and copy it to the iMac's hard drive, or will it just do the selective restore, kind of like Windows 7's setting a restore point, and any rollback should be partial - i.e., it only needs to restore a few files to make the system work fine again, but is it the same as on OS X Lion's Time Machine restore?
Is restoring a better approach than reinstalling OS X?