A26361-K881-Z102-4-7619
5
Introduction
Features
second power supply unit in the redundant configuration ensures operation can
continue uninterrupted. The defective power supply unit can be replaced online
(for further details see section “Hot-swap Power Supply Units” on page 79).
Ventilation
Every CPU has a heat sink with fan.
The server is cooled by means of the power supply unit fans and by four system
fans (redundant configuration).
The power supply unit fans are assigned to the respective power supply unit.
Four system fans are integrated in the standard system fan configuration. Each
two system fans form a redundant pair.
If one fan in one redundant pair fails, the other fan ensures operation can
continue uninterrupted. A defective system fan can be replaced online (for
further details see section “Replacing a Hot-swap System Fan” on page 90).
High level of availability and reliability
When memory data is accessed, 1-bit errors in the main memory are recog-
nized and automatically corrected with the ECC (Error Correcting Code)
method. The patented memory scrubbing function regularly starts up the EDC
mechanism and thus ensures continuous data integrity.
The memory modules used support Chipkill™ technology, which in addition
increases the effectiveness of the monitoring and correction of memory errors.
Support is likewise provided for hot-spare memory technology, in which a
memory bank is used like a replacement bank. If a memory module fails, the
bank with the defective memory is automatically deactivated and the
replacement bank is activated in its place (assuming it has been configured
appropriately in the BIOS). The deactivated memory bank is no longer used and
the faulty memory module can be replaced at the next opportunity. In order to
be able to use the hot-spare memory function, all occupied memory banks must
have an identical memory configuration.
ASR&R (Automatic Server Reconfiguration and Restart) restarts the system in
the case of an error and automatically „hides“ the defective system components.
The PDA (Prefailure Detection and Analyzing) technology from Fujitsu Siemens
Computers analyzes and monitors all components important for system
reliability.