Fujitsu PRIMERGY BX620 S4 User Manual page 185

Memory redundancy function
The memory redundancy function (memory mirroring function) can be set for this Server Blade. When
the memory redundancy function is enabled, a mirrored set containing two identical memory banks is
configured. When data is saved, it is written to both memory banks. This means that the available
memory capacity (logical capacity) is half that of the physical capacity during memory redundancy.
When a memory error occurs, the memory bank in which the error occurred will be automatically
disconnected, and the other memory bank will take over operations. After replacing the failed memory
or the failed memory bank, the mirrored set is automatically restored.
Installation conditions
Install the memory module according to the following conditions.
table: Conditions when using the memory mirroring function
Mirror set #1
Bank 1
Slot 1 Slot 2
I I
I I
I: Install memory module.
-: Do not install memory module.
Install memory modules of the same model to the four slots that make up one mirror set.
The capacity of two mirror sets can be different.
BIOS settings
After installing the memory module, perform the following settings.
1
Start the BIOS Setup Utility.
"8.2.1 Starting and Exiting the BIOS Setup Utility" (pg.205)
2
From the [Server] menu - the [Memory Status] submenu, change the [Memory
Mirror] setting to [Mirror].
"8.2.11 Memory Status Submenu" (pg.221)
3
Save the setting and exit the BIOS Setup Utility.
"8.2.11 Memory Status Submenu" (pg.221)
PRIMERGY BX620 S4 Server Blade User's Guide
Bank 2
Slot 3 Slot 4 Slot 5
I I
I I
Mirror set #2
Bank 3
Slot 6 Slot 7
− − −
I I I
Bank 4
Slot 8
−
Ι
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