Installing A Dimm - IBM System x3800 Installation Manual

v There must be at least one memory card with one pair of DIMMs installed for the
v When you install additional DIMMs on a memory card, be sure to install them in
v Add odd-numbered DIMMs to each available memory card first, and then add the
v Install the DIMMs on each memory card in the order shown in the following table.
v If memory mirroring is enabled, you can hot-replace one memory card at a time

Installing a DIMM

Complete the following steps to install additional DIMMs:
14
IBM System x3800 Type 8866: Installation Guide
server to operate.
pairs. All the DIMM pairs on each memory card must be of the same size and
type.
even-numbered pairs.
Each memory card must have at least one pair of DIMMs. See the User's Guide
on the IBM System x Documentation CD for additional memory configuration
installation sequences.
Table 2. Memory card installation sequence
Installation order
First
Second
Third
Fourth
on each memory power bus.
If a problem with a DIMM is detected, light path diagnostics will light the
system-error LED on the front of the server, indicating that there is a problem
and guide you to the defective DIMM. When this occurs, first identify the
defective DIMM; then, remove and replace the DIMM.
The following illustration shows the LEDs on the memory card.
Error
Memory Hot-Swap Enabled
Memory Hot-Swap Enabled LED: When this LED is lit, it indicates that
hot-swap memory is enabled.
Error LED: When this LED is lit, it indicates that a DIMM or memory card has
failed.
Memory Port Power LED: When this LED is off, it indicates that power is
removed from the port and that you can remove the memory card to replace a
failed memory card or DIMM.
Memory card
1
2
3
4
Memory Port Power
DIMM pair
1 and 3
2 and 4
1 and 3
2 and 4
1 and 3
2 and 4
1 and 3
2 and 4