Fujitsu PRIMERGY RX200 S5 Operating Manual page 15

Preface
Features
High level of availability and data security
When memory data is accessed, 1-bit errors are identified in the main memory
and automatically corrected with the error correcting code (ECC) method. The
patented memory scrubbing function regularly starts up the ECC mechanism,
ensuring continuous data integrity.
The memory modules used support RDIMM technology (Chipkill™), which also
increases the effectiveness of the monitoring and correction of memory errors.
Memory Mirroring is also supported (requires four, eight or twelve memory
modules). Memory Mirroring is roughly comparable to RAID level 1 for hard disk
arrays. Memory modules are protected against failure by mirroring. The basic
configuration requires four identical memory modules in two different banks.
ASR&R (Automatic Server Reconfiguration and Restart) restarts the system in
the event of an error and automatically "hides" the defective system
components.
The PDA (Prefailure Detection and Analysing) technology from Fujitsu
Technology Solutions analyzes and monitors all components that are critical for
system reliability.
A RAID controller supports different RAID levels and increase the availability
and data security of the system.
The hot-plug HDD modules provide additional protection.
Operating Manual 15
RX200 S5