Hi Neil Desai , You can configure and deconfigure processors by using any one of the following procedures: Configuring and Deconfiguring Processors (CPUs) [BCH Menu] Configuring and Deconfiguring Processors (CPUs) [EFI Shell] You can configure and deconfigure processors from any cell that is assigned to an nPartition. Deconfiguring a processor causes it to not be available for use by the cell or its nPartition. Whenever you configure or deconfigure processors, you must reboot the corresponding nPartition for the configuration change to take effect. -------------------------------------------------------------------------------- Configuring and deconfiguring processors may be restricted based on any capacity on demand (iCOD) or pay per use (PPU) contracts for the server complex. -------------------------------------------------------------------------------------------------------------- ___________________________________________________________________________________________________________ Configuring and Deconfiguring Processors (CPUs) [BCH Menu] ____________________________________________________________________________________________________________ From the BCH Configuration Menu, use the CPUCONFIG command to configure or deconfigure processors in the local nPartition. The BCH Menu is available only on HP 9000 systems.Step 1. Access the BCH Main Menu for the nPartition whose processors you want to configure or deconfigure. Login to the service processor (MP or GSP) and enter CO to access the Console list. Select the nPartition console. When accessing the console, confirm that you are at the BCH Main Menu (the Main Menu: Enter command or menu> prompt). If at a BCH menu other than the Main Menu, then enter MA to return to the BCH Main Menu. Step 2. Enter CO to access the BCH Configuration Menu. Step 3. From the Configuration Menu, use the CPUCONFIG command to configure or deconfigure a processor on a cell in the nPartition. Enter CPUCONFIG with no arguments to list the current current processor configurations for all cells assigned to the local nPartition. CPUCONFIG cell cpu OFF deconfigures the specified processor (cpu) on the specified cell (cell). CPUCONFIG cell cpu ON configures the specified processor on the cell Enter HELP CPUCONFIG for details. Step 4. Reboot the nPartition using the REBOOT command. Whenever changing processor configurations you must reboot the corresponding nPartition to allow the configuration changes to take place. Step 5. Exit the console and service processor interfaces if finished using them. To exit the BCH environment type ^B (Control-B); this exits the nPartition console and returns to the service processor Main Menu. To exit the service processor, type X at the Main Menu. ______________________________________________________________________________________________________________ Configuring and Deconfiguring Processors (CPUs) [EFI Shell] ______________________________________________________________________________________________________________ From the EFI Shell environment, use the cpuconfig command to configure or deconfigure processors in the local nPartition. The EFI Shell is available only on HP Integrity systems.Step 1. Access the EFI Shell environment for the nPartition whose processors you want to configure or deconfigure. Login to the service processor (MP or GSP) and enter CO to access the Console list. Select the nPartition console. When accessing the console, confirm that you are at the EFI Boot Manager menu (the main EFI menu). If at another EFI menu, select the Exit option from the sub-menus until you return to the screen with the EFI Boot Manager heading. From the EFI Boot Manager menu, select the EFI Shell menu option to access the EFI Shell environment. Step 2. Enter the cpuconfig command with no arguments to list the current processor configurations for all cells assigned to the local nPartition. Step 3. Use the cpuconfig command to change processor configurations for any of the cells assigned to the local nPartition. cpuconfig cell cpu off deconfigures the specified processor (cpu) on the specified cell (cell). cpuconfig cell cpu on configures the processor on the cell. Enter help cpuconfig for more details on configuring and deconfiguring processors from the EFI Shell. Step 4. Reboot the nPartition using the reset command. Whenever changing processor configurations you must reboot the corresponding nPartition to allow the configuration changes to take place. Step 5. Exit the console and service processor interfaces if finished using them. To exit the EFI environment type ^B (Control-B); this exits the nPartition console and returns to the service processor Main Menu. To exit the service processor, type X at the Main Menu. Best Regards, Syam Kumar