HP ProLiant 5500 Compaq ProLiant 5500 Setup and Installation Guide Pentium II - Page 80
Interlock System, Accessing the Drive Cage Back Plane
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4-15 Interlock System The Compaq ProLiant 5500 server interlock system prevents power distribution throughout the system if the memory board, processors, or peripheral board (including the power switch cable) are not fully installed or properly seated. The ProLiant 5500 server is not equipped with chassis interlocks; the board interlocks provided connect the memory board, processors, and peripheral board (including the power switch cable) in one interlock chain. When one of the connected components in the interlock chain is improperly seated in the connector, the LED associated with the fault origination point will illuminate. See Chapter 1 for details regarding the interlock error. WARNING: Care must be exercised when the hood or side covers are removed because the system does not shut down automatically. Accessing the Drive Cage Back Plane These instructions cover the removal of the simplex drive cage and the installation of the Duplex drive cage. This procedure enables controller duplexing of the internal SCSI drives. Refer to the Chapter 7 for more information on configuring duplex and simplex modes. 1. Remove the side cover as shown in Figure 4-1. 2. Remove the fans and all cables to the fans. CAUTION: Never power up the server if the fans have been removed from either the processor or I/O section. Overheating and damage to hardware could result. Compaq ProLiant 5500 Servers Setup and Installation Guide For use with Intel Pentium II Xeon processor-based servers only