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Hello,
Since the last 2 days my MBP has been really sluggish with spinning beachballs for every activity. The HD is on the verge of a catastrophic failure. I'd like to replace the HD with a new SATA 500gb HD , however, I'm not sure about the size of the HD. Should I go for the 2.5 inch 7mm or the 9mm? Also, it'd be great if any particular brand is recommended. Thanks a mill!
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My first bet on this would be a defective or damaged hard drive/IR cable. Does it run OK from an external drive?
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I havent tried to boot from external disk yet. Considering the noise the internal disk makes and how slow accessing media/surfing web is I guessed it would be better to replace the HD. Having run drivedx, the result show the drive is failing.
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Hello,
Either one is fine. Why do you want to replace it with a 500gb, the price difference for a 1TB is not too big and you will have plenty of space. We use Western Digital and Seagate in our store. If you want the brand with the lowest failure rate search for HGST ( is a western digital company ).
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Hello Alex,
Thanks for replying! Sorry for the noobish question, Since you say either one is fine, will the HD fit in exactly or will I have to buy the so-called 'caddy' as some mentioned in forums? I thought 500gb would suffice considering it isnt my primary machine. Having looked up the price I've decided to go for 1TB.
They should have a plastic bracket in box, that fits under the hard drive. Even without that bracket the HD should not touch anything else because you need to transfer the side screws from the old drive and they will help the drive not to move and stay in its place.
You might want to review this: BackBlaze - One Billion Drive Hours and Counting: Q1 2016 Hard Drive Stats.
You also may want to free up some space on your drive (have no less than 25 % free) as well as boot up under an external drive to run Disk Utility to check your drive. Often I find a very full and/or a highly fragmented drive is the root issue assuming the HD SATA cable is not bad. Give that a try, but first make a backup!
Cheers Alex!
@dan: I've got 50% free space on 750gig internal disk. The disk also makes a whirring noise. Drivedx tests show the drive is failing. Its safe to replace the HD i guess.
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