Seriously, this is how the damn PS3 HDD should have been designed IN THE FIRST PLACE. There is no damn reason to lock the stupid HDD to a specific console and it would have solved the locked saves dying with your system (or ALL saves dying with your system if you never made a backup) problem from day 1.
If MS can let me unplug my 360's HDD and plug it into any other 360 then there is NO reason my PS3 can't do the same, and above all locked saves and locked storage devices should not exist together. The system either has all save data be copyable/backup-able or lets the storage device (in this case, the HDD) be usable on any system, NOT LOCK BOTH!
"A train station is where a train stops. A bus station is where a bus stops. On my desk I have a workstation..." - ComradOtter