IBM 887022X Maintenance Manual - Page 120
Hot-replace, DIMMs
UPC - 000435151957
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DIMM Retaining clip Figure 60. Inserting a DIMM into a DIMM slot Attention: If a gap exists between the DIMM and the retaining clips, the DIMM has not been properly installed. In this case, open the retaining clips and remove the DIMM; then, reinsert the DIMM. c. Repeat steps 9a and 9b for each DIMM. 10. Close the DIMM access door. 11. If necessary, reinstall either the top SMP Expansion Module or SMP baffle in the server. See "Installing the SMP Expansion Module and cover" on page 101 for instructions. 12. Close the top cover. 13. Slide the server into the rack enclosure until it stops; then, secure the server in the rack enclosure using the quick release latches. 14. Connect all external cables and turn on the server. Note: When you install or remove banks of DIMMs, the server configuration information changes. Therefore, you must change and save the new configuration information by using the Configuration/Setup Utility program (see "Starting the Configuration/Setup Utility program" on page 14). Hot-replace DIMMs This section includes the instructions needed to hot-replace DIMMs in the servers SMP Expansion Module with the power on. Notes: 1. Ensure that before you attempt to hot-replace a DIMM, the new DIMM is the same size and clock speed and that memory mirroring is enabled. 2. You can enable the hot-add and hot-replace memory features or you can enable the fastpath memory feature, but you cannot enable both at the same time. The fastpath memory feature increases memory performance. Attention: If two SMP Expansion Modules are installed in a server, you can not hot-replace or hot-add the DIMMs in the lowest SMP Expansion Module. In order to gain access to the DIMMs of a lower SMP Expansion Module, you must first remove the upper SMP Expansion Module which requires you to turn off the server. See "Removing and replacing DIMMs" on page 108 for information on how to remove and replace DIMMs while the server is turned off. 110 xSeries 445 Type 8870: Hardware Maintenance Manual and Troubleshooting Guide