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Active Memory
Memory scrubbing and Memory ProteXion
Memory mirroring
IBM Director
8
User's Guide
™
Active
Memory is an feature that improves the reliability of memory through
memory mirroring, memory scrubbing, and the Memory ProteXion
Memory scrubbing tests the memory at regular intervals to detect and report
potential memory errors before they can cause server outages.
If a detected error is recoverable, the Memory ProteXion feature corrects the error
and rewrites the data to another memory location on the same DIMM. The error is
logged in the error log so that you can determine whether preventive maintenance
is necessary.
If there are not sufficient undamaged memory locations that the data can be
rewritten to, the error is unrecoverable. Other conditions can also cause
unrecoverable errors. If a detected error is unrecoverable, LEDs on the Light Path
Diagnostics panel are lit to indicate the failing DIMM.
You do not have to enable memory mirroring to use memory scrubbing and the
Memory ProteXion feature.
Memory mirroring stores data in memory port 1 and memory port 2 simultaneously.
To support memory mirroring, you must install identical dual inline memory modules
(DIMMs) in memory port 1 and memory port 2. For more information, see the
section about installing memory modules in the Option Installation Guide on the
Documentation CD.
To enable memory mirroring through the Configuration/Setup Utility program, select
Advanced Setup from the main menu, and select Memory Settings. For more
information about using the Configuration/Setup Utility program, see Chapter 2,
"Configuring the server", on page 17.
Note: To use the hot-add memory feature memory mirroring must be disabled in
the BIOS code.
With IBM Director, a network administrator can:
v View the hardware configuration of remote systems, in detail
v Monitor the usage and performance of critical components, such as
microprocessors, disks, and memory
v Centrally manage individual or large groups of SAMSUNG and non-SAMSUNG
Intel-based servers, desktop computers, workstations, and mobile computers on
a variety of platforms
IBM Director provides a comprehensive entry-level workgroup hardware manager.
Key features include:
v Advanced self-management capabilities for maximum system availability
v Multiple operating-system platform support, including Windows 2000, Windows
XP Professional, Novell NetWare, Linux, and Caldera OpenUNIX
™
feature.
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