122 Removing and Installing PartsConnecting and Disconnecting Drive CablesWhen connecting and disconnecting a serial ATA data cable, disconnect thecable using the pull-tab.The serial ATA interface connectors are keyed for correct insertion; that is, anotch or a missing pin on one connector matches a tab or a filled-in hole onthe other connector.Hard DrivesCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, laceration by moving fan blades, orother unexpected injuries, always unplug your computer from the electrical outletbefore opening the cover.NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, setthe 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.Check the documentation for the drive to verify that it is configured for yourcomputer.Removing a Hard Drive1 Follow the procedures in "Before You Begin" on page 97.2 Remove the computer cover (see "Removing the Computer Cover" onpage 99).3 Disconnect the power and data cables from the drive.4 Disconnect the data cable from the system board.
