My second internal drive ejects improperly

I installed an optical drive when I purchased my iMac in June 2012. When my iMac falls asleep the otical drive ejects and I have to restart to remount it since disk doctor can't see it. Does anyone know why this is happening and how to solve it?

Hello babowa,
I misspoke, I installed a 2nd internal hard drive, a Fusion 2 TB drive. It "ejects improperly" when the iMac is put to sleep. I've set up energy preferences to either put the hard drive to sleep whenever possible and have also checked that option off with the same results. I create aliases on the side bar for easy access to folders on that drive that disappear when this happens and I have to keep recreating them. I installed the internal drive to avoid the issue of external drives ejecting improperly which forces me to restart my machine or the ext. drive. I also wanted to take advantage of the speed gain from the internal connection. I can't find any info with anyone else having this problem. The Fusion drive is partitioned into 3 volumes. I'm going to reformat it into 1 and see if that makes a difference.
Thanks for your response, although it wasn't helpful.

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