7Slide the sliding-plate lever to release the shoulder screw and slide the drive out of the lower 5.25-inch drive bay.

8Set the drive aside in a secure location.

Installing an Optional Fourth Hard Drive (Tower Computer)

NOTICE: In a tower configuration with multiple optional drives, there can only be one floppy drive or Media Card Reader, which must be installed in the lower

3.5-inch drive bay. The third hard drive must occupy the upper 3.5-inch drive bay. The fourth hard drive must occupy the lower 5.25-inch drive bay.

1Follow the procedures in "Before You Begin" on page 143.

2Remove the computer cover (see "Removing the Computer Cover" on page 145).

3If you are installing a new drive, unpack the drive and prepare it for installation.

Check the documentation for the drive to verify that it is configured for your computer.

NOTE: Drive-panel inserts may contain screws on the inside. You can attach the screws to new drives that do not have any screws.

4If you are installing a new drive, remove the drive panel (see "Removing the Drive Panel (Tower Computer)" on page 213) and the drive-panel insert (see "Removing a Drive-Panel Insert" on page 218) from the lower

5.25-inch drive bay. Use the screws provided with the new drive to install the drive into the drive bay.

5Slide the sliding-plate lever and hold it in place as you guide the drive into the lower 5.25-inch drive bay and gently slide it in until it is securely seated.

202

Adding and Replacing Parts

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Dell T3400 manual Installing an Optional Fourth Hard Drive Tower Computer