Dell OptiPlex 330 (Late 2007) - Manual (Page 44)

Drive Interface Connectors
The drive cable connectors are keyed for correct insertion. Properly align the cable connector key on the cable and the drive before connecting.
Connecting and Disconnecting Drive Cables
When connecting and disconnecting a serial ATA data cable, disconnect the cable using the pull-tab.
The serial ATA interface connectors are keyed for correct insertion; that is, a notch or a missing pin on one connector matches a tab or a filled-in hole on the
other connector.
Hard Drives
Check the documentation for the drive to verify that it is configured for your computer.
Removing a Hard Drive
1. Follow the procedures in Before You Begin .
2. Remove the computer cover (see Removing the Computer Cover ).
3. Disconnect the power and data cables from the drive.
4. Disconnect the data cable from the system board.
1 power cable 2 data cable
1 interface cable 2 interface connector
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, laceration by moving fan blades, or other unexpected injuries, always unplug your computer from
the electrical outlet before removing the cover.
NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently
cushion it.
NOTICE: If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this procedure.