The accessible drives/components integrated in these locations cannot be replaced during operation.
Power supply
The server has up to four hot-plug power supply units that automatically switch to a mains voltage of 100 - 127 V / 200 - 240 V. This ensures redundant power supply. If one power supply unit is defective, the other(s) then guarantee(s) unimpaired operation. The faulty power supply unit can be replaced during operation (for further details see "Hot-plug power supply units" on page 87).
Cooling
Each processor has a heat sink. Further cooling for the installed processors is provided by hot-plug fans (optionally in a redundant configuration).
Temperature sensors variably adjust the fans. If a temperature sensor fails or is removed, the fans affected run at maximum speed so as to provide the greatest possible protection for the hardware.
If a fan fails, unimpaired further operation is ensured. A defective fan module can be replaced during operation (for further details see "Hot-plug fans" on page 91).
High level of availability and data security
When memory data is accessed, 1-bit errors in the main memory are identified and automatically corrected with the ECC (Error Correcting Code) method. The patented memory scrubbing function regularly starts up the EDC mechanism (Error Detection Code) and thus ensures continuous data integrity.
The memory modules used support SDDC technology (Chipkill™), which further increases the effectiveness of memory error monitoring and correction.
Support is likewise provided for hot-spare memory technology, in which a memory module is used like a replacement module. If a memory module fails, the module with the defective memory is automatically deactivated and the replacement module is activated (provided it has been configured for appropriately in the BIOS). The deactivated memory module 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 DIMM slots must have an identical memory configuration.
Memory modules can be protected against failure through mirroring (memory mirroring, requires two or four memory modules).
