9-52 Upgrading Your Server
Online Spare Memory
The online spare memory feature places a memory group as spare memory in standby state. If the current memory group often exceeded the predefined threshold for the maximum number of correctable ECC errors occurrence, the online spare memory feature automatically switches to the standby memory group by copying the contents of the current memory group into the standby memory group. This feature enables continuous operation without replacement of the memory board.
How to enable the online spare memory feature
–Installing additional memory boards
Add memory boards (DIMM) according to this chapter.
The installed memory boards must be the same capacities and type as the memory boards installed as "DIMM group #1" and "DIMM group #2". Memory slots are as shown for "DIMM group #3". The table below shows combinations of DIMMs installed.
| DIMM group #1 | DIMM group #2 | DIMM group #3 |
A | 1GB (256MB*4) | Not installed | 1GB (256MB*4) |
B | 1GB (256MB*4) | 1GB (256MB*4) | 1GB (256MB*4) |
C | 2GB (512MB*4) | Not installed | 2GB (512MB*4) |
D | 2GB (512MB*4) | 2GB (512MB*4) | 2GB (512MB*4) |
E | 4GB (1GB*4) | Not installed | 4GB (1GB*4) |
F | 4GB (1GB*4) | 4GB (1GB*4) | 4GB (1GB*4) |
G | 8GB (2GB*4) | Not installed | 8GB (2GB*4) |
H | 8GB (2GB*4) | 8GB (2GB*4) | 8GB (2GB*4) |
NOTES:
1.Column "DIMM group #3" shows sockets for online spare memory.
2.1GB (256MB*4) Memory boards are installed in DIMM group #1 as standard when the server is delivered.
–Setting BIOS
The menu item below has been added to "Memory Configuration", which is explained in Chapter 4. To enable the memory mirroring / online spare memory feature, change the setting of the item to each. The item is
Item | Parameter |
Online Sparing/Mirroring memory | [Disabled] |
| Sparing |
| Mirroring |
