Currently Being ModeratedDec 8, 2011 5:47 AM (in response to Miles Kaye)
Target Disk Mode is neccessary for this.
Currently Being ModeratedOct 23, 2012 12:59 PM (in response to Fortuny)
A june 12, 2012 post from a DiskWarrior techie said Target Disk mode still works with Thunderbolt but an Apple Genius in the Scottsdale store said Target disk mode does not work and is not necessary since OS X 10.7.4.
I LOVE Target Disk mode to solve many problems and hope I can still use it on my new Mac purchase.