Acer Altos R920 Series User Manual
Page 192
Appendix B: Memory configuration
174
Dual-ranked memory sparing
When a dual-ranked FBDIMM is used as spare, the BIOS can
independently select a physical rank on that FBDIMM as the spare unit
and utilize the other physical rank as a normal unit. This selective
sparing ensures maximization of available memory while still providing
RAS.
Note: Populating differently ranked FBDIMMs for sparing is not a
good practice and may yield unpredictable results.
To configure memory to memory sparing mode:
1
Run BIOS setup. See “Entering BIOS setup” on page 100.
2
Use the up and down arrow keys to select the Advanced menu.
3
Use the up and down arrow keys to select Memory
Configuration, then press Enter. The Memory Configuration
menu appears.
4
Use the up and down arrow keys to select Memory RAS and
Performance Configuration, then press Enter. The Memory RAS
and Performance Configuration menu appears.
5
Set the Select Memory RAS Configuration to Sparing.
6
Return to the Memory Configuration menu option.
•
Make sure Current Configuration indicates Dual-DIMM
Sparing Mode. If the option indicates Current Memory
Configuration, you may need to install more memory to
meet the requirements of the selected configuration.
•
Make sure that Memory Sparing Possible indicates Yes.
7
Press F10 to save changes and exit.
8
Press Y to confirm. The server reboots to activate the changes.