Acer Network Device Altos R520 Bedienungsanleitung PDF herunterladen (Seite 82)

3 System upgrade

To upgrade to a four FBDIMM mirrored memory configuration, four

additional FBDIMMs must be added to the system. All four memory

modules in the second set must be identical to the first with the

exception of speed. The memory controller hub (MCH) will adjust to

the low-speed FBDIMM memory.

Note: After upgrading system memory to this feature, the

memory RAS setting in the BIOS setup must be set to Mirroring

configuration. Refer to the BIOS setup’s Configure Memory RAS

and Performance screen on page 101 for more information.

Memory sparing configuration

The system provides FBDIMM sparing capabilities. Sparing is a RAS

feature that involves configuring a FBDIMM to be placed in reserve so

it can be use to replace a failed FBDIMM.

Note: FBDIMM sparing occurs within a given bank of memory and

is not supported across branches.

The system supports two types of memory sparing configurations:

• Single branch mode sparing

In single branch mode sparing the following population rules must

be observed:

• DIMM slots A1 and B1 or DIMM slots A2 and B2 must be

identical in organization, speed, and speed

• DIMM slots A1 and A2 or DIMM slots B1 and B2 need not be

identical in organization, size and speed

• Sparing should be enabled in the BIOS setup utility

• System BIOS will configure rank sparing mode.

• The largest memory size among the DIMM pairs (DIMM_A1,

DIMM_B1) and (DIMM_A2, DIMM_B2) will be selected as the

spare pair unit.

• Dual branch mode sparing

Dual branch mode sparing requires that all eight FBDIMM slots be

populated and must comply with the following population rules:

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Acer Network Device Altos R520 Bedienungsanleitung Seite 82