Has Been Adopted - Fujitsu PRIMEQUEST 480 System Design Manual

6.3 System Mirror
Mirroring of memory
In System Mirror, memory is divided into two groups for mirroring. Therefore, the
logical memory capacity becomes half of the physical memory capacity installed.
However, data read and write operation is duplicated and performed simultaneously.
Thus, even in the case where a part of memory fails, the operation continues using the
rest of the memory. Reliability increases with the mirroring of memory. Figure 6.5
shows the logical numbers of memory (DIMMs) that are mirrored.
Figure 6.5 Logical numbers of memory (DIMM) for which a redundant
configuration has been adopted
C122-B001-02EN 6-9