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The DIMMs must be added in matched pairs, that is, two at a time, and they
must also match the equivalent pair of DIMMs on the matching memory card
on the other power bus.
A minimum of 4 GB of memory must be installed in the server for hot-add
memory to be available. Additionally, for 32-bit operating systems, the
Physical Address Extension (PAE) mode has to be enabled to take advantage
of the additional memory.
For details about performing a hot-add operation, and restrictions, see IBM:
System x3850 M2 and System x3950 M2 User's Guide:
http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5073029
3.2.6 Memory configuration in BIOS
The BIOS includes settings related to processor and operating system
configuration and performance purposes. You can adjust the settings.
To access the settings and configure the memory subsystem in the server's
BIOS setup:
1. Power on or reboot the system.
2. Press F1 during system startup, when prompted.
3. From the Main Menu window, choose Advanced Setup.
4. Select Memory Options. The Memory Settings selection menu opens, as
shown in Figure 3-15.
Memory Card 1
Memory Card 2
Memory Card 3
Memory Card 4
Memory Array Setting
Initialization Scrub Control
Run Time Scrub Rate
Figure 3-15 Memory BIOS settings
Memory Settings
[ HPMA (High Performance Memory Array ]
[ Scrub on every boot
[ Default scrub rate ]
Chapter 3. Hardware configuration
]
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