Configuring and Deconfiguring Memory (DIMMs)

You can configure and deconfigure memory by using any one of the following procedures:

You can configure and deconfigure memory modules (DIMMs) from any cell that is assigned to an nPartition. Deconfiguring memory causes it to not be available for use by the cell or its nPartition.

Whenever you configure or deconfigure memory, you must reboot the corresponding nPartition for the configuration change to take effect.




	NOTE: DIMMs operate either in ranks of four or echelons of two, depending on memory architecture of the server. When you deallocate a DIMM, all other DIMMs in the rank or echelon also will not be used the next time the nPartition boots. Each rank or echelon is numbered (0, 1, 2, and so on up to hexadecimal number F as needed). The DIMMs in the rank or echelon are lettered (A to D). For example, rank 0 includes DIMMs 0A, 0B, 0C, and 0D; echelon 1 has DIMMs 1A and 1B.

Procedure 7-14 Configuring and Deconfiguring Memory (BCH Menu)

From the BCH Service Menu, use the DIMMDEALLOC command to configure or deconfigure memory modules (DIMMs) in cells assigned to the local nPartition. The BCH Menu is available only on HP 9000 systems.

Access the BCH Main Menu for the nPartition whose memory 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.
Enter SER to access the BCH Service Menu.
From the Service Menu, use the DIMMDEALLOC command to list the current configurations of memory modules (DIMMs) in the cells assigned to the local nPartition. Also use the DIMMDEALLOC command to configure and deconfigure DIMMs for cells in the local nPartition.
NOTE: When you deallocate a DIMM, all other DIMMs in the rank or echelon also will not be used the next time the nPartition boots.
Enter DIMMDEALLOC with no arguments to list the current DIMM configurations for all cells in the local nPartition.
DIMMDEALLOC cell dimm OFF deconfigures the specified DIMM (dimm) on the cell (cell) indicated.
DIMMDEALLOC cell dimm ON configures the DIMM on the cell.
Use DIMMDEALLOC cell to display the DIMM configuration for a cell.
Enter HELP DIMMDEALLOC for details.
Reboot the nPartition using the REBOOT command.
Whenever changing memory configurations you must reboot the corresponding nPartition to allow the configuration changes to take place.
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.

Procedure 7-15 Configuring and Deconfiguring Memory (EFI Shell)

From the EFI Shell environment, use the dimmconfig command to configure or deconfigure memory modules (DIMMs) in cells assigned to the local nPartition. The EFI Shell is available only on HP Integrity systems.

Access the EFI Shell environment for the nPartition whose memory 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.
Enter the dimmconfig command with no arguments to list a current summary of the memory configuration for the local nPartition.
Use the dimmconfig command to change memory configurations for any of the cells assigned to the local nPartition.
NOTE: When you deallocate a DIMM, all other DIMMs in the echelon also will not be used the next time the nPartition boots.
dimmconfig cell dimm OFF deconfigures the specified DIMM (dimm) on the cell (cell) indicated.
dimmconfig cell dimm ON configures the DIMM on the cell.
Use dimmconfig cell to display the DIMM configuration for a cell.
Enter the help dimmconfig command for more details.
Reboot the nPartition using the reset command.
Whenever changing memory configurations you must reboot the corresponding nPartition to allow the configuration changes to take place.
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.

Configuring and Deconfiguring Memory (DIMMs)

Technical documentation

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