Fujitsu GP 7000F Manual page 54

CHAPTER 2 M200 Main Cabinet
Memory configuration
Memory ECC feature
Checking the memory diagnostics
Example for normal operation
20
The M200 has 16 DIMM slots, allowing for as much as 4 gigabytes of main memory. When
installing the DIMMs, the following conditions must be satisfied:
 When installing the first set of DIMM, install a set of 4 modules of the same size in slots 0 to 3.
 At subsequent memory expansions, install a set of 4 modules of the same size in slots 4, 5, 6, 7;
and 8, 9, 10, 11; then 12, 13, 14, 15.
IMPORTANT
If any of the above conditions is not satisfied when installing the DIMMs, some DIMMs are
degraded in the power-on diagnostics. When adding the memory modules, check that the
DIMMs are installed correctly.
The EDO DRAM is used as the memory element. The single-bit error correction and multiple-bits
error detection features are available for a large capacity memory by using the Error Check Code
(ECC) system. A single-bit error can be isolated down to the memory slot on which it occurred. A
multiple-bit error can be isolated down to the pair of slots on which it occurred.
To check that the system recognizes installed memory modules correctly, execute the
show-post-results command at the ok prompt. A module that does not satisfy any condition
described in "Memory configuration" or a module judged to be faulty by memory diagnostics is
treated as an invalid module. The screen below lists the command execution results related to
memories and their meanings.
=== Memory =========
Type : EDO
SLOT# Size[Valid(MB)/Existing(MB)
0-3 32/32 32/32 32/32 32/32
4-7 32/32 32/32 32/32 32/32
8-11 ----- ----- ----- -----
12-15 ----- ----- ----- -----
*=Error SLOT
In this example, a memory module has been placed in degraded mode.
=== Memory =========
Type : EDO
SLOT# Size[Valid(MB)/Existing(MB)
0-3 32/32 32/32 32/32 32/32
4-7 0/32 0/0*
8-11 ----- ----- ----- -----
12-15 ----- ----- ----- -----
*=Error SLOT
:
:
:
:
:
0/32 0/32 :
:
:
Total
128/128 MB
128/128 MB
0/0 MB
0/0 MB
Total
128/128 MB
0/96 MB
0/0 MB
0/0 MB