Western Digital Computer Hard Drive Installation Manual page 14

b) If securing the hard drive in a 5.25-inch drive bay,
You will first need to install 5.25-inch mounting hardware in order to properly mount
the hard drive. If you do not have mounting brackets contact your system manufacturer
or your local computer dealer or call Western Digital technical support.
4. Reconnect the power cord and power on the computer: Make sure that the controller
card is properly seated before powering on the computer.
WESTERN DIGITAL HARD DRIVE
INSTALL THE HARD DRIVE WITH A CONTROLLER CARD - 10
INSTALLATION GUIDE