Installing a drive in the rear hard disk drive cageThe following notes describe the types of hard disk drives that the server supportsand other information that you must consider when you install a hard disk drive:v The server supports two 25.4 mm (1-inch), slim, 3.5-inch non-hot-swap hard diskdrives.v The server does not support hot-swap hard disk drives.v The server comes with a front hard disk drive cage and a rear hard disk drivecage. In the standard configuration, the server comes with a hard disk drive inthe front drive cage. You can install an additional hard disk drive in the rear drivecage. The rear drive cage is adjacent to the power supply.v A non-hot-swap hard disk drive does not require a backplane or tray, and it doesnot have indicator LEDs. However, you must install the drive in either the front orrear drive cage that comes with the server.v The front hard disk drive cage is under the CD or DVD drive assembly.Therefore, you must remove the CD or DVD drive assembly to access the fronthard disk drive cage. If you decide to replace the hard disk drive in the front drivecage, follow the instructions in “Replacing the front hard disk drive” on page 36.v You can install either two SAS hard disk drives or two SATA hard disk drives inthe server. The server does not support combining SAS and SATA drives in thesame configuration. Operating the server with an unsupported hard disk driveconfiguration might cause unpredictable results. For a list of supported drives forthe server, see http://www.ibm.com/servers/eserver/serverproven/compat/us/.v If you install only one hard disk drive, for faster startup, install it in the primarystartup device location; that is, the front drive cage. If you install a second harddisk drive, install it in the rear drive cage.v You do not have to set any jumpers or switches on the hard disk drives beforeyou install the drives in the server.Removing the rear hard disk drive cage assemblyBefore you can install a hard disk drive in the rear hard disk drive cage or remove adrive from this drive cage, you must first remove this drive cage from the server.To remove the rear hard disk drive cage assembly, complete the following steps.Retention latchRear hard diskdrive cage30 System x3455 Types 7984 and 7986: User’s Guide