2-16 General DescriptionPower SupplyThe SCSI hot-plug hard disk drive model contains one auto-sensing 465-watt power supply at anoperating frequency of 50/60Hz.A second optional power supply may be added as part of a fault-tolerant hot-swap design. With twopower supplies installed, in the unlikely event of a power supply failure, the load is transferred tothe remaining power supply without interruption to normal operation. In this case the faulty powersupply can be replaced without powering down the system.NOTE: The power supplies are not hot-swappable unless there are twopower supplies installed.The power supply for SATA fixed hard disk drive model is rated for 425 watts of power at anoperating frequency of 50/60Hz.The power subsystem supports implementation of remote management features including remoteenable that permits power to be activated from a variety of sources.Peripheral BaysYour server supports a variety of standard PC AT-compatible peripheral devices. The chassisincludes these peripheral bays: A 3.5-inch front panel bay for mounting the standard 3.5-inch diskette drive (supports 720KB and 1.44 MB diskette media) A standard CD-ROM drive bay Three hot-swap SCSI hard disk drive bays or two SATA hard disk drive bays for mountinghard disk drives installed in easily removable drive carriers.NOTE: The hot-swap SCSI hard disk drive bays contain a hot-swapback plane that require an 80-pin single connector attachment (SCA)connector on the drives that you install.System CoolingThe chassis includes a fan module with five fans for cooling the processor(s), hard drives, and PCIcards. The fan system is located in the middle of the chassis to pull cooling air through the chassis.The power supply contains two built-in fans for cooling.The SCSI hot-plug hard disk drive model can include five optional redundant fans.
