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I bought DIY Bundle: 500GB OWC 3G SSD and HDD Kit for Late 2009 - 2010 iMacs. For my iMac Late 2009 27’’ Aluminum, EMC2374 (11,1). My original Seagate 1TB HDD has more and more bad sectors and I decided to replace it. But the optical drive doesn’t work anymore either and I am using external one. I think I might change the optical drive but I am not sure which kit I need and if the one I bought is okay for my iMac. For my case is also better because I using OS X (Mountain Lion) 1% and the 99% is my favorite FreeBSD. I have installed also rEFIt which I thing it will saw the new drive and I will install FreeBSD on the new one. I know that thread is old but I hope that someone answer me. Thank you.
The OWC kit you got allows you to swap-out your HDD for a SSD. Is that want you want to do here? Since your HDD is failing and your optical drive is not working how about getting a 2.5” HDD and using this adapter iMac & Mac mini Dual Drive Enclosure (OWC offers a similar unit OWC Data Doubler). While some might do the reverse putting the SSD in the optical drives bay and leave the HDD in the HDD bay that won’t get you the most performance as the optical bays SATA port is only SATA I (1.5Gb/s) and the HDD bay is SATA II (3.0 Gb/s). The only issue will be the HDD must be able to run at the slower SATA I speed. Here’s the IFIXIT guide you’ll need to follow to replace your HDD iMac Intel 27" EMC 2309 and 2374 Hard Drive Replacement. You’ll need the OWC inline thermal sensor with the SSD. And here’s the guide to swap-out your optical drive with the new 2.5” HDD Installing iMac Intel 27" EMC 2309 and 2374 Dual Drive and here’s a HDD which will work in your system WD Green WD15NPVT 1.5 TB HDD