IBM 887022X Maintenance Manual - Page 122

DIMM Retaining clip Figure 62. 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 8a and 8b for each DIMM. 9. Close the DIMM access door. 10. If necessary, reinstall the SMP baffle. 11. Close the top cover. 12. Slide the server into the rack enclosure until it stops; then, secure the server in the rack enclosure using the quick release latches. Hot-add memory The hot-add memory feature enables you to add DIMMs without turning off the server. This feature is supported only in those servers using Windows Server 2003 Enterprise or Datacenter editions. This section includes the instructions needed to enable the hot-add memory feature on the sever and to hot-add DIMMs to the server's SMP Expansion Module with the power on. Notes: 1. Memory mirroring must be disabled before using the hot-add memory feature. 2. Either port 1 or port 2 (see "DIMM banks", Figure 57 on page 106) must be completely empty. The empty port is where you can add DIMMs. The xSeries 445 model servers have four 512 MB DIMMs standard, two DIMMs in each port. To enable hot-add, you must move two DIMMs so that all four are in one port. This is because the power to the port to which you plan to add DIMMs must be off before you add the DIMMs. Once any DIMMs are added and the door closed, power is applied. 3. If the server has two SMP Expansion Modules installed, you cannot move all memory to the top SMP Expansion Module to support hot-swap or hot-add. This is because the bottom SMP Expansion Module must have memory installed (at least two DIMMs) for the server to boot. 4. You must hot-add two DIMMs at a time. You can add two, four, six or eight DIMMs. Once you add DIMMs and close the memory door, you cannot add more memory without powering off the server. 112 xSeries 445 Type 8870: Hardware Maintenance Manual and Troubleshooting Guide