A recent comment from a happy OWC customer pointed out that something as simple as a bad cable can cause an internal hard drive or SSD to appear to be failing. For this customer, the Mac’s system report (accessible from the Apple menu > About this Mac… > System Report) showed that the drive was failing, so it was time to replace the hard drive with a faster and larger SSD. When the replacement still didn’t fix the problems, the customer decided to replace the SATA cable as well — and that was the solution. Here’s the full comment:
If you’re considering swapping out the old drive on a MacBook Pro for a faster SSD — especially if it appears that the drive is going bad — be sure to replace the cable while you’re at it. They’re inexpensive and can ensure a positive outcome to your drive upgrade. Check our listings for a cable that will work for you.