Fujitsu N800 manual Introduction, Power supply, Cooling, Hot-plug PCI

Introduction Features

Power supply

The server is equipped with three power supplies. This ensures a power supply redundancy. If a defect occurs in one unit, the other units ensures unimpaired further operation. The defective power supply unit can be replaced during operation (hot-plug power supply).

Cooling

The server contains two independent cooling subsystems:

–The upper system for cooling the system board, the I/O board and the upper part of the control panel.

–The lower system for cooling the memory modules, drive cages and the power supplies.

Both subsystems offer redundant cooling capabilities. As shipped from the factory, the minimum configuration includes six fans in the upper cooling system and three power supplies (each with an integrated fan) in the lower cooling system

IAll chassis covers must be on the system for proper cooling.

Hot-plug PCI

The server is equipped with four PCI buses with six hot-plug PCI slots (33 MHz) and four hot-plug PCI slots (100 MHz). Boards in these slots can be replaced during operation if required.

High level of availability and failure protection

When accessing stored data, 1-bit-errors in the main memory are automatically recognized and corrected (ECC = Error Checking and Correction). The patented memory scrubbing function regularly starts up the EDC mechanism and thus ensures continuous data integrity.

ASR&R (Automatic Server Reconfiguration and Restart) tunes out defective system components during an automatic system reboot.

The Prefailure Detection and Analyzing Technology (PDA) reports the threat of system errors or problems to the system administrator so that preventative measures can be taken.

The hot-swap-capable hard disks provide additional protection.

U41243-J-Z156-1-76 3