Due to the Thunderbolt 1.2 update, I had to restore from a Time Machine Backup, but after that, Time Machine won't do incremental back up any more.
The hard drive has 250GB of free space... It was 1TB and is used for backing up the iMac 27 inch which has about 700GB for the Mac partition (the other 300GB is for Bootcamp).
So after the restore, it won't incrementally back up any more. It would try to back up everything from scratch and will fail because it tries to back up about 600GB into the 250GB free space and will stop.
Is there a way to make it work again?