  SAS Requires optional Controller. Dell HV52W Perc H310 [URL] Also if you have no optical drive you will need this [URL] 1B23LY600 Precision T3600 T5600 T5610 T7600 Drive Cage w/ DVD Drive 27-5 [URL] So it looks like 0WM1YT is the part for the 3.5 bay. It mounts INSIDE of the Optical drive bay and the front bezel comes off to add the vent for cooling. Fan wire attaches to ITEM 15 on motherboard. However on my configurations its paired with the 685W  0WPVG2 power supply not the 425W. [URL] [URL] [IMAGE] Found HDD Fan Header ITEM 15 [IMAGE] [IMAGE]             [IMAGE] [IMAGE]  
On the bottom of the case there are two slots -- I get that, I just need caddies and two drives will be taken care of. Where would I insert the third drive? There is a YouTube video showing one being installed in the cage next to the optical drive, but what I have there are two 2'5" slots. Do I need to pull those two out so that some other part can be inserted in their stead? What is that other part? Do I need to install a fan too, as shown in the video, or is the the area well enough ventilated without it already? How do I pick the right fan? Thank you!
How to install a 3rd magnetic drive into a T3610?