HP ProLiant ML570 Generation 2 Server Memory Installation Guide

Memory
Online Spare Memory Technology
This section details the features and DIMM installation requirements for online spare
memory.
Features
Online spare memory uses an online spare bank to provide additional memory
protection. Online spare memory has the following advantages:
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Online spare memory provides DIMM failover capabilities for correctable errors.
Bank D on memory board 1 is configured as an online spare bank. If a DIMM on
either memory board exceeds the pre-defined limit for correctable errors,
indicating that it may fail, the system fails over to the online spare bank.
If one memory board is installed, the server supports up to 12 GB of system
memory and 4 GB of online spare memory using 2-GB DIMMs.
If two memory boards are installed, the server supports up to 28 GB of system
memory and 4 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.
Online spare memory can be configured with either one or two memory boards.
Bank D on the memory board in slot 1 is the online spare bank, even if two memory
boards are installed. The online spare bank can provide memory protection for up to
seven other banks: three banks on the memory board in slot 1 and four banks on the
memory board in slot 2. If any DIMM in these seven banks exceeds the pre-defined
limit for correctable errors, indicating that it may fail, the system performs the
following actions:
Copies the contents of the degraded bank to the online spare bank
Deactivates the failing bank
Activates the online spare bank
Provides notification of the DIMM failure using the memory board LEDs, the
front-panel internal health LED, and Insight Manager 7.
HP ProLiant ML570 Generation 2 Server Memory Installation Guide 1-15
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Writer: Jennifer Hayward File Name: b-ch1 Memory.doc
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