IBM JS20 Hardware Maintenance Manual - Page 90
Important, Attention
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with these switch modules. In this example, you could then install two Ethernet switch modules, two pass-thru modules, or one Ethernet switch module and one pass-thru module. Because pass-thru modules are compatible with a variety of I/O expansion cards, installing two pass-thru modules would allow use of several different types of compatible I/O expansion cards within the same BladeCenter unit. Important: v Installation of an I/O expansion card requires removal of the hard disk drive that is installed in IDE connector 2. The I/O expansion card occupies the same space as this hard disk drive and replaces it. You cannot install a hard disk drive in IDE connector 2 while an I/O expansion card is installed in the blade server. v The Myrinet Cluster Expansion Card for IBM BladeCenter comes with a Eserver cable for connection to the system board of a compatible device. However, the cable is not used in the BladeCenter JS20 Type 8842. Therefore, when you install a Myrinet Cluster Expansion Card for IBM BladeCenter into a Eserver BladeCenter JS20 Type 8842, do not connect the cable from the I/O expansion card to the system board. v If you plan to install a Fibre Channel expansion card and use it for remote startup (boot) operations, call the IBM Support Center for additional information. In the U.S. and Canada, call 1-800-IBM-SERV (1-800-426-7378). In other countries, go to http://www.ibm.com/planetwide/ to locate your support telephone numbers. Attention: If the hard disk drive installed in IDE connector 2 contains any information that you want to keep, back it up to another storage device. 80 BladeCenter JS20 Type 8842: Hardware Maintenance Manual and Troubleshooting Guide