User-01,
I would ignore the i/o errors reported, which don't necessarily mean bad sectors. When a 56 GB disc is tested, a couple of i/o errors may be in the normal range. The sectors may be reaccessed and the data retrieved successfully the next time around. What you are seeing is just a report that indicates that the disc passed the full diagnostic test. Modern ATA drives have self-correcting controllers that mark and retire bad sectors.
As backup2k1 suggested, just keep the disc defragged and use scandisk occasionally. If there are any errors caused by bad sectors, they will be detected by scandisk. Don't worry about the EasyRecovery test.