218 Adding and Replacing PartsNOTICE: In a mixed configuration of two SAS drives and one SATA drive, the SATAdrive must be the boot (primary) drive and must go in the FlexBay.16 If the drive you just installed is the primary drive, insert bootable mediainto drive A.17 Enter the system setup program (see "System Setup " on page 89), andupdate the appropriate Drive option.18 Exit the system setup program and reboot the computer.19 Partition and logically format your drive before you proceed to the nextstep.See the documentation for your operating system for instructions.20 Test the hard drive. See "Dell Diagnostics" on page 136 for instructions.21 If the drive you just installed is the primary drive, install your operatingsystem on the hard drive.Removing an Optional Third Hard Drive (Tower Computer Only)CAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in theProduct Information Guide.CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before opening the cover.NOTICE: To prevent static damage to components inside your computer, dischargestatic electricity from your body before you touch any of your computer’s electroniccomponents. You can do so by touching an unpainted metal surface on thecomputer.NOTICE: To avoid damage to the hard drive, do not set it on a hard surface.Instead, set the drive on a surface, such as a foam pad, that will sufficiently cushionit.1 If you are replacing a hard drive that contains data that you want to keep,back up your files before you begin this procedure.2 Follow the procedures in "Before You Begin" on page 151.3 Remove the computer cover (see "Removing the Computer Cover" onpage 153).4 Remove the drive panel (see "Removing the Drive Panel" on page 233).
