For a really simple way to understand how this could be, imagine if the recovery volume contained the sum of the other volumes. With a list of numbers, missing one of them, and their sum, you can always reconstruct the missing number.
For a really simple way to understand how this could be, imagine if the recovery volume contained the sum of the other volumes. With a list of numbers, missing one of them, and their sum, you can always reconstruct the missing number.