Fujitsu TX200 S6 manual Preface High level of availability and data security

Preface

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 EDC mechanism, ensuring continuous data integrity.

The RDIMM memory modules used support SDDC technology (Chipkill™), which further increases the effectiveness of memory error monitoring and correction.

Memory modules can be protected against failure by mirroring (Memory Mirroring). Memory Mirroring is roughly comparable to RAID level 1 for hard disk arrays. The basic configuration requires two identical memory modules in two different banks.

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 (provided it has been configured for appropriately in the BIOS). The deactivated memory bank is no longer used and the faulty memory module can be replaced during the next system maintenance. In order to be able to use the hot-spare memory function, all occupied memory banks have to be equipped with identical memory modules.

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 Analysis) technology from Fujitsu Technology Solutions analyzes and monitors all components that are critical for system reliability.

Optional RAID controllers support RAID levels like 0, 1, 5, ... and increase system availability.

The hot-plug HDD modules provide additional availability.

20 Operating Manual TX200 S6