Chapter 4. Multinode hardware configurations 209 Baseboard Management Controller (BMC) firmware:http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5073127 System BIOS update:http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5073120Our observation has shown that using system flash utilities that are based on thefollowing items, do not reflash any component if the version in the update sourceis the same as that on the system: UpdateXpress CD or UpdateXpress system packs Operating system firmware update packages for Windows (wflash) or Linux(lflash) systemsSee section 5.1, “Updating firmware and BIOS” on page 246.After applying the new codes, power off all systems, and then remove the powersource for 30 seconds.4.6 Cabling of multinode configurationsThis section describes how the x3950 M2 systems are cabled.This section assumes you have already installed the systems into your rack usingthe instructions in Rack Installation Instructions for System x3850 M2 and x3950M2, available from:http://www.ibm.com/support/docview.wss?uid=psg1MIGR-5073030Before you begin the multinode cabling, install the Enterprise Cable ManagementArm (CMA) that is shipped with your x3950 M2.If your x3950 M2 has been upgraded from an x3850 M2, remove the standardcable management arm that came with the x3850 M2 and replace it with theImportant: After updating the BIOS, reset the BIOS to the default settings.Recommendation: Use DOS-based packages, which provide an option tore-flash (overwrite) the same code level. This should be done at least forFPGA and BMC on all systems.Note: The scalability cables used to join the nodes together are a specificlength; no empty U-spaces should exist between the nodes.
