How do you fix correct hard drive not found error on PS3?
The first thing I'd check is the hard drive is properly seated. It sounds like your suffering from an intermittent connection.
- Do a backup of any save information.
- Make sure pins are in good condition on both the hard drive and PS3 connector (check dust levels as well)
- Plug it into a PC and do a zero data wipe using any compatible utility.
- Plug it back into your PS3 and let your PS3 format it.
Verify that the hard drive specifications are equivalent, ie RPM, disk I/O, cache size.