Installing Or Replacing Memory Modules - IBM eServer xSeries 445 Type 8870 Option Installation Manual

Installing or replacing memory modules

This section contains instructions for installing and replacing memory modules. It
includes information about the memory mirroring and Memory ProteXion features of
the Active Memory technology.
The following notes describe the types of dual inline memory modules (DIMMs) that
your server supports and other information that you must consider when installing
DIMMs:
v IBM periodically makes updates available to provide enhancements to the
v Your server operates with a minimum of two 512 MB DIMMs installed in slots 1
v Your server supports 512 MB, 1 GB, and 2 GB DIMMs for a maximum of 64 GB
v The hot-replace memory feature enables you to replace DIMMs without turning
v The hot-add memory feature enables you to add DIMMs without turning off the
v When using memory mirroring, all of the DIMMs in each memory port must be
v Damaged or faulty DIMMs can be replaced without having to replace all of the
v See the ServerProven list at http://www.ibm.com/pc/compat/ for a list of memory
v When installing or removing DIMMs, you must install or remove the DIMMS two
standard features of your server. Currently, your xSeries 445 server supports the
memory mirroring and Memory ProteXion features of the Active Memory
technology. Check the IBM support Web site occasionally to make sure that you
have the most current levels of system software installed.
and 3 in the SMP Expansion Module.
of system memory, depending on your configuration.
off the server. To use the hot-replace memory feature, you must:
– Enable memory mirroring using the Configuration/Setup Utility program.
– Replace the DIMMs with DIMMs of the same type, size, and clock speed.
server. To use the hot-add memory feature, you must:
– Disable memory mirroring using the Configuration/Setup Utility program.
– Ensure that there are no DIMMs installed in the port in which you want to
hot-add DIMMs.
– Have a minimum of 4 GB of memory installed in the server before you can
configure the hot-add memory feature.
the same size and clock speed.
DIMMs in the bank. Ensure the new DIMM is the same size and clock speed as
the other DIMMs in the bank.
modules for use with your server. For optimum performance, balance the amount
of memory between the two ports.
at a time and in the order shown in the following table:
Table 1. Memory installation order
Port
1
2
1
2
1
2
1
2
Bank Pair
1 1
1 2
2 3
2 4
3 5
3 6
4 7
4 8
Slot number
1, 3
9, 11
2, 4
10, 12
5, 7
13, 15
6, 8
14, 16
Chapter 2. Installing options
39