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MacBook Pro 13" Internal drive randomly ejecting itself when in use.

I am using a 2nd internal drive with an optical bay caddy. However, whenever I use the 2nd drive it will randomly eject itself after maybe 5-10 minutes of use. This drive only does this internally and works perfectly externally. I have tried other drives in the same slot and they all work fine. The drive also works fine in the normal hard drive slot. I am tired of having this issue and have yet to find a solution. Do I need to replace the drive? It is still under warranty as I got it yesterday. Any help would be appreciated. MacBook Pro 13" Mid-2012 (MacBookPro 9,2)

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This is a "known issue" when the optibay drive is not the boot drive. Think about it. You are sucking a lot of power running two HDs and your Energy Saver is trying to adjust for that. You can change the Energy Saver settings... but that will shorten battery life. Using an SSD would draw less energy also.

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I have the same problem. If i put SSD in the optical bay and HDD in the main bay and boot from SSD, would the problem be solved?

Would it cause any conflicts due to the fact that the SSD is a SATA iii and the optical bay is slower? I would hate it if the SSD with the OS on it would suddently get unmounted!

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Hello, I had the same problem with a Macbook Pro 13 mid 2012. I have a 250 Gb Samsung 850 EVO SSD running in the optibay and a 1 Tb Toshiba HDD in the main bay. After 1 week of this setting, the HDD starts to eject itself, in many different circumstances. How I fixit (after several things I've tested, with no results, such as changing the Energy Saver settings and others): I bought a new internal hard drive cable from ifixit. Problem solved! I'm running without any problems for more than 2 weeks, with lots of data transfer (reading and writing) between the HDD and the SSD and other external drives. I really think that this broken cable was the problem. Maybe it got damaged during the HDD substitution processes (I did it at least 3 times in the past 3 years)

Hope this post helps anyone with the same problem

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Bruno can you please share the link for that cable ?

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The Hard Drive cable is a known issue on the MBPro 13 Mid-2012 (maybe others too?) Apple often replaces the cable when you send MBP's in via AppleCare. Possibly even when there are no HD issues.

Here's the link: MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable

You may find it cheaper at other sites, but I would avoid the under $10 ones you can find on Amazon.

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Hi. Did you find a solution to it. I tried to turn down the sleep time to 5 minutes, but yet the disk ejects itself. It never happened before.

Please let me know if you have fixed it and how?

Cheers

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Asad Palekar ''- For future reference you posted a Question in the place where only Answers belong. Please use the add comment link to the appropriate Answer, Question. or. create your own original Question.

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I had the very same problem for MONTHS and it was driving me crazy. MacBook 15" Early 2011, 512MB SSD + 2TB HDD instead of the optical drive. The HDD kept ejecting randomly, requiring switching the MacBook completely off and back on. I thought it's a faulty drive, cables, or another piece of hardware. I even thought of buying a new MacBook.

Then I googled out a solution: try swapping the two internal drives... Now I have the startup SSD in place of the original DVD drive and my classic 2TB HDD in place of the original HDD. No random eject since then, for 2 weeks or so, already.

Can't find the original solution, but the explanation had something to do with SATA 2 vs SATA 3, etc. So I am trying to pass this solution to others that came across the same problem.

P.S. you don't need to change any settings, your system will boot just fine after swapping the two drives.

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ok I recently update my hdd to an ssd. Hdd was working fine as the main drive then when i switched SSD as the main drive it started to boot it out. This thread helped me out from spending lots of money thank you.

I bought a new MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable & replaced the old one & voila, no more problem. So far it’s been an hour & still running.

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Brady Bilderback さん、ありがとうございました！
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