Removal and replacement procedures 28
8.
Lift the battery module from the server.
9. Remove the battery from the module.
To replace the component, reverse the removal procedure.
Memory options
You can expand server memory by installing PC2-3200 DDR2 SDRAM DIMMs. The system supports up to
six ECC Registered DDR2 SDRAM DIMMs.
NOTE: The Advanced Memory Protection option in RBSU provides additional memory protection beyond
Advanced ECC. By default, the server is set to Advanced ECC Support. Refer to "ROM-Based Setup
Utility ("HP ROM-Based Setup Utility" on page 38)," on the Documentation CD, for more information.
The server supports two types of memory configurations:
• Standard memory configuration for maximum performance with up to 12 GB of active memory (six
2-GB memory modules)
• Online spare memory configuration for maximum availability with up to 6 GB of active memory
while simultaneously supporting up to 6 GB of online spare memory
NOTE: When configuring the memory sub-system to run in Online Spare mode, only single rank DIMMs
can be installed in the system. Online Spare Mode will not work with dual rank DIMMs installed in the
system.
Single- and Dual-rank DIMMs
PC2-3200 DIMMs can either be single- or dual-rank. While it is not normally important for you to
differentiate between these two types of DIMMs, certain DIMM configuration requirements are based on
these classifications.
Certain configuration requirements exist with single- and dual-rank DIMMs that allow the architecture to
optimize performance. A dual-rank DIMM is similar to having two separate DIMMs on the same module.
Although only a single DIMM module, a dual-rank DIMM acts as if it were two separate DIMMs. The
primary reason for the existence of dual-rank DIMMs is to provide the largest capacity DIMM given the
current DIMM technology. If the maximum DIMM technology allows for creating 2-GB single-rank DIMMs,
a dual-rank DIMM using the same technology would be 4-GB.
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