Apple released the MacBook Pro 15" Unibody with a new aluminum upper case machined from a single aluminum block.

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Unibody Laptop Dual Drive, HD active all the time


I just installed a second HD with the Unibody Laptop Dual Drive on my Late 2011 15" macbook pro.

Everything run fines, but I can hear the HD working 100% the time, it never idles, therefore the battery life has degraded heavily.

Any ideas?


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Go under the Apple in the upper left hand corner to System Preferences > Hardware > Energy Saver and click the box that says "put hard drive to sleep when possible".

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Does it work for the second hard drive too? I assume it only works for the main hard drive.


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Mario Delgado will be eternally grateful.
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