What is the cause of multiple hard drive failures?
The HP Pavilion dv9000 is not the oldest computer out there. About 4 months ago, the stock hard drive (about 2 years old) began making scratching noises and such, so I went out and bought an external to back it up, as well as a new Western Digital WD Scorpio Black 500 GB 7200 RPM (the "desktop-performance" laptop hard drives).
So I tried backing it up with the external, but the old drive died mid back up, and it was completely dead.
I installed the new hard drive, and hooked it up with Windows 7, but even 2 weeks in, I started having start up problems. Windows would fail to start up occasionally, and I had to do start-up repair a few times. 2 months in, Windows failed again, I started start-up repair, and it didn't work. I went into the hard drive self-check, it passed the quick test, but received an "error #10009: replace hard disk" from the comprehensive check.
I know that means I need to replace it again, but I'm wondering if anyone knows what could cause this. Did I just get unlucky with 2 bad hard drives, or is there something else that could cause this?