Front View (Tower Orientation)Your operating system product key label is located on yourcomputer.NOTE: The Operating System CD and the Drivers and Utilities CD areoptional and may not ship with all computers.NOTE: The color of your CD varies based on the operating systemyou ordered.l How to use Linuxl E-mail discussions with users of Dell Precision™ products and the Linuxoperating systeml Additional information regarding Linux and my Dell Precision computerDell Supported Linux Sitesl Linux.dell.coml Lists.us.dell.com/mailman/listinfo/linux-precision1 upper 5.25-inch drive bayHolds a CD/DVD drive.2 lower 5.25-inchdrive bayYou can use the bay for an optional CD/DVD drive or a fourth (SATAonly) hard drive.3 upper 3.5-inchdrive bayYou can use the bay for an optional third hard drive (SATA or SAS),floppy drive or Media Card Reader.4 lower 3.5-inchdrive bayYou can use the bay for an optional floppy drive or Media Card Reader.5 hard-driveactivity lightThe hard drive light is on when the computer reads data from or writesdata to the hard drive. The light might also be on when a device suchas your CD player is operating.6 IEEE 1394connector(optional)Use the optional IEEE 1394 connectors for high-speed data devicessuch as digital video cameras and external storage devices.7 USB 2.0connectors (2)Use the front USB connectors for devices that you connect occasionally,such as flash memory keys or cameras, or for bootable USB devices(see System Setup for more information on booting to a USB device).It is recommended that you use the back USB connectors for devicesthat typically remain connected, such as printers and keyboards.8 Dell™ rotatablebadgeTo rotate the Dell badge for tower-to-desktop conversion; remove thefront panel (see Removing the Front Panel), turn it over, and rotate the