Dell OptiPlex E1 - Manual (Page 73)

Hard-Disk Drive Options: Dell™ OptiPlex™ E1 Systems
Low-Profile Chassis | Mini Tower Chassis
Low-Profile Chassis
The hard-disk drive assembly (consisting of the hard-disk drive and the hard-disk drive bracket) is located inside the left-front area of the chassis and is attached to the
bottom of the chassis. A single 1-inch-high EIDE hard-disk drive can be mounted on the hard-disk drive bracket.
Mini Tower Chassis
The hard-disk drive assembly (consisting of the hard-disk drive and the hard-disk drive bracket) is located under the externally accessible drive bays at the front of the
computer. The hard-disk drive assembly can contain either 1 or (2) 1-inch-high EIDE hard-disk drives, or (1) 1-inch-high EIDE hard-disk drive and (1) 1.6-inch-high
EIDE hard-disk drive.