232 Planning, Installing, and Managing the IBM System x3950 M2Example 4-5 POST: special keystrokesPress ESC to reboot and bypass merge attempt on next bootPress F1 for SetupPress F2 for Preboot Diagnostics (DSA)Press F12 to select boot deviceDelete a partitionTo change your partitions or add another system, clear this partition first and thenconfigure your new partition. Select the Partition ID, power off the systems in thispartition, and then click the Delete button.Clear partition information in a complexTo delete all partition information in a complex, power off all systems in thecomplex, then click Reset (under Reset Defaults) to get the defaults.4.8.2 Behaviors of scalability configurationsThe typical behaviors you might observe when working with systems in amultinode complex are described in this section.First, however, review the following checklist again if you experience difficultiescreating partitions: Did you upgrade each x3850 M2 system to a x3950 M2 system to be capablefor scalability configuration as described in 4.5, “Upgrading an x3850 M2 to anx3950 M2” on page 204? Does each system match the prerequisites as described in 4.4, “Prerequisitesto create a multinode complex” on page 201? Did you provide the correct cabling at all nodes depending on the number ofnodes in your complex as described in 4.6, “Cabling of multinodeconfigurations” on page 209? Are you familiar with the Scalability Manager in the Remote SupervisorAdapter II as described in 4.7, “Configuring partitions” on page 220?Note: A partition or all partition settings cannot be deleted if any of the systemis powered on.