loud fan noise after adding hdd
I installed a second hdd in my 2008 Mac Pro and as soon as I started up there has been a constant very loud fan noise like I've never had before. Here's what I put in: WD2003FZEXWD Black 2T 7200 rpm SATA 6gb/s 64MB cache. I formatted using Disk Utility. This is my first time installing a hd and I basically screwed it into the bracket and plugged it in. Have I missed something?
Mac Pro, OS X Yosemite (10.10.5)