> Once every block in the device has been written at least once,
> the SSD is doomed to a worst case performance state in which its
> spare blocks are at a minimum and data must be moved each time a
> new block is rotated into use.
I wonder if the manufacturers include "extra" flash chips to get around this problem. For example, if the device had 1.1 GB of flash, but reported 1 GB, it would never run into the worst-case scenario.