Advanced Memory Protection Modes; Online Spare Memory Technology - HP ProLiant DL580 Setup And Installation Manual

Memory
IMPORTANT: HP recommends that you use only HP DIMMs. Third-party DIMMs may have
additional installation requirements. For information about third-party DIMM installations, refer
to the Advanced Memory Protection white paper on the ProLiant website at www.hp.com.
IMPORTANT: You must power down the server before installing additional DIMMs, unless
you are using Hot-Add functionality.

Advanced Memory Protection Modes

The ProLiant DL580 Generation 2 server supports four types of Advanced Memory
Protection modes: online spare memory, single-board mirrored memory, hot-plug
mirrored memory, and Hot-Add memory functionality. All modes include Advanced
ECC protection.

Online Spare Memory Technology

Features
Online spare memory uses an online spare bank to provide additional memory
protection. Online spare memory has the following features and advantages:
•
Online spare memory provides DIMM failover capabilities for single-bit
correctable errors. This feature is enabled when one bank of DIMMs on one
memory board is configured as an online spare bank. If a DIMM on either
memory board exceeds the HP defined limit for single-bit correctable errors,
indicating that it may fail, the system fails over to the online spare bank.
•
If one memory board is installed, the ProLiant DL580 Generation 2 server
supports up to 8 GB of system memory and 8 GB of online spare memory using
2-GB DIMMs.
•
If two memory boards are installed, the ProLiant DL580 Generation 2 server
supports up to 24 GB of system memory and 8 GB of online spare memory using
2-GB DIMMs.
IMPORTANT: DIMMs in the online spare bank must be of equal or greater capacity than the
DIMMs in the remaining banks.
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