Memory Options; Online Spare Memory Configuration - HP ProLiant ML370 Generation 4 Reference And Troubleshooting Manual

58 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Memory options

You can expand server memory by installing PC2-3200R Registered DDRII
DRAM DIMMs. The system supports up to eight DIMMs.
The server supports two types of memory configurations:
•
Standard memory configuration (Advanced ECC) for maximum
performance, using up to 16 GB of active memory (eight 2-GB memory
modules)
•
Online spare memory configuration for maximum availability, using up to 12
GB of active memory and 4 GB of online spare memory
Refer to "DIMM Slots (on page 17)" for DIMM slot locations and bank
assignments.

Online spare memory configuration

In the online spare configuration, the ROM automatically configures the last
populated bank as the spare memory. If only banks A and B are populated,
bank B is the spare bank. If banks A, B, C, and D are populated, bank D is the
spare bank. If DIMMs in a non-spare bank exceed the limit for the single-bit
correctable errors threshold as defined by the Pre-Failure Warranty, the system
copies the memory contents of the failing bank to the spare bank. The system
then deactivates the failing bank and automatically switches over to the spare
bank.
For online spare memory support, DIMMs installed in the spare bank must be of
equal or greater capacity than the DIMMs installed in other banks.
For example, if bank A is populated with two 512-MB DIMMs and bank B is
populated with two 1-GB DIMMs, bank C must be populated with two 1-GB or
greater DIMMs in order for online spare memory support to function properly.
After installing DIMMs, use RBSU to configure the system for online spare
memory support ("Configuring online spare memory" on page 114).