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Towards the end of last year I decided to remove the CD drive on my late-2007 MacBook and replace it with a 2nd hard drive (using an aftermarket 'caddy').

Several months in, my 1 TB WD Blue (2nd) hard drive refused to open some files so I did a surface scan. This revealed the horror within! Hundreds of bad blocks, so I recovered as much data as I could and put the drive to one side. I replaced it with a different 1 TB Samsung drive. Last week the exact same problem has happened so I have removed the caddy and fitted the CD drive back in.

Is there something I have missed or does it look like the caddy is killing hard drives? It's either that or I have had major bad luck with hard drives.

Is there something I have done wrong? Or is it my laptop that is on its last legs? (this would worry me more). How can I tell?

Sorry if this sounds vague, but I'm quite worried. Please let me know if you need more information.

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    It seems unlikely that anything could destroy a disk's blocks like that. I'm voting on a statistical anomaly, as unlikely as that is... Perhaps you should have played the lottery instead! – William T Froggard Jun 15 '15 at 23:01
  • Judging by my luck, I'd end up owing them money! – Andy Jun 15 '15 at 23:03
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    How is it mounted in the aftermarket caddy? Some of them -- like the one I have in my 2009 MacBook Pro -- are cheaply made, and the mounting screws don't always line up. You may want to check the mounting solution to see if the drive is potentially being physically damaged due to movement, or even flexing of the bottom panel causing HDD torsion. – Rampant Jun 15 '15 at 23:35
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Try using one of the various temperature utilities to get the temperature of the hard drive. Perhaps the CD-ROM drive space isn't ventilated very well, and your hard drives have put out more heat than the original CD-ROM drive.

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