Since you started out with a 1TB drive and you expanded the bootstrap partitions, what partition(s) did you short to get the extra space to expand the bootstrap partitions. A couple of things come to mind with your OP problem. One, the truncated backup could be damaged from the rebooting issue. Might try a backup from another source. The other might be capacitors that are going bad and need to be replaced. (That was my problem). One last thing. Some drive diagnostics program can/will 'recertify' a failing drive as it is testing it such that it may pass diagnostics again. See if you have a program that will check to see if a drive has been reassigning any sectors. There has to be enough reassigning of sectors for the SMART to trigger but the dynamic reallocation of sectors can also cause some of the same problems.