HP ProLiant ML310 Generation 5p User Manual page 35

Close the upper and lower wire retainers.
c.
Install the retaining screw.
7.
IMPORTANT:
Install a SCSI controller
8.
Connect the power cable to the rear of the drive.
9.
When installing a SCSI tape drive, an optional SCSI HBA controller is required.
("Installing expansion boards" on page 39).
Hardware options installation 35