Dell OptiPlex GX270 - Manual (Page 110)

Removing a Hard Drive
1. Disconnect the power cable and hard-drive cable from the drive.
2. Press in on the tabs on each side of the drive and slide the drive toward the I/O panel and remove it from the computer.
Installing a Hard Drive
1. Unpack the replacement hard drive, and prepare it for installation.
2. If your replacement hard drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure
each rail to the drive. Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and
then inserting and tightening all four screws (two screws on each rail).
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
IDE Serial ATA
1 power cable
2 hard-drive cable
NOTICE: If you install a serial ATA hard drive, it is recommended that you have Dell-supplied data and power cables.