I know that this is a old post now, but i'm having the same problem. the bluray drive in my 60gb ps3 was originally broke. i can not update to 3.55. now i have fixed the drive after buying a replacement on ebay and switching the logic boards.
the drive works flawlessly but i still can not update my ps3s system, i can copy the update from memory stick to the hard drive ready for install, but when installing the installation stops at 3% and gives me a error.
when i try installing from recovery mode it says that the data is corrupted. even though i used a update from my region, from an official ps3 game. any help?