Unassigning (Removing) Cells from an nPartition

Procedure 6-8 Removing Cells from an nPartition (nPartition Commands)

From the command line, use the parmodify command to remove cells from an nPartition. You also can use the parstatus command to list current nPartition details such as cell assignments.

	NOTE: You can remotely perform this task using remote administration options supported by the Enhanced nPartition Commands or Partition Manager Version 2.0. Remote administration is supported by the Partition Manager ToolsSwitch Complexes action and by the nPartition command -u... -h... options or -g... -h... options. For details see “Tools for Configuring nPartitions”.

1. Login to a system with the nPartition commands installed.

   If using remote administration features to modify an nPartition, you can login to any system with Enhanced nPartition Commands installed.

   If removing an inactive cell from an nPartition, you can use local management from any nPartition in the complex. For example, you can login to HP-UX running on any nPartition in the same server complex.

   If removing an active cell from an nPartition and not using remote administration features, you must login to the nPartition from which the cell is to be removed.

2. Issue the parstatus -c#... command to list the current nPartition assignments and status for each cell (-c# where # is the cell number) that you plan to remove from its assigned nPartition.

   Specify each cell you plan to remove with a separate -c option. For example, to list details on cells 0, 1, and 2, issue the parstatus -c0 -c1 -c2 command.

   The cells must all be assigned to the same nPartition in order to remove them using a single procedure. Otherwise, if the cells are assigned to different nPartitions, you must perform this procedure separately for each nPartition.

3. Remove the cell from the nPartition to which it is assigned by using the parmodify -p# -d#... command.

   Specify the nPartition (-p# where # is the nPartition number) and each cell (-d# where # is the cell number) that you want to remove from the nPartition.

   If you are performing this task using the Enhanced nPartition Commands to remotely administer a server, also specify the -u... -h... options or the -g... -h... options as appropriate.

   If removing multiple cells from an nPartition, specify each cell with a separate -d# option on the same command line (such as: parmodify -p1 -d0 -d2... to remove cells 0 and 2 from partition number 1).

   Slightly different procedures are required for removing active cells and inactive cells. See the following information for details (“Guidelines for Removing an Active Cell” and “Guidelines for Removing an Inactive Cell”).

   If at least one of the cells you plan to remove is currently active, then follow the guidelines for removing active cells.

   • Guidelines for Removing an Active Cell. Specify the -B option to parmodify when removing an active cell from an nPartition if you want the nPartition to become active following its reboot for reconfig.

     For example, the following command removes cell 4 from partition 0 and the -B option ensures that the nPartition will be active following its reboot for reconfig.

     # parmodify -p0 -d4 -B Cell 4 is active. Use shutdown -R to shutdown the system to ready for reconfig state. Command succeeded. #

     You must perform a reboot for reconfig after you issue the parmodify command to remove active cell(s) from the nPartition. (This is covered in the step that follows.)

   • Guidelines for Removing an Inactive Cell. When removing an inactive cell from an nPartition you do not need to specify the -B option to parmodify and do not need to perform a reboot for reconfig of the nPartition to which the cell is assigned.

     When you use parmodify to remove an inactive cell, the cell is immediately unassigned from its nPartition.

     If you specify the -B option when removing an inactive cell from an inactive nPartition, then the cell is immediately removed and the modified nPartition is booted past its inactive shutdown for reconfig state and becomes an active nPartition.

     For example, the following command removes cell 2 from partition 0. Because cell 2 is inactive, it is immediately unassigned.

     # parmodify -p0 -d2 Command succeeded. #

4. As needed, perform a reboot for reconfig of the nPartition being modified (HP-UX: shutdown -R; Windows: shutdown /r; Linux: shutdown -r time; OpenVMS: @SYS$SYSTEM:SHUTDOWN with an automatic system reboot).

   You must perform a reboot for reconfig if you have removed an active cell or have specified the -B option when modifying an active nPartition.

   See “Reboot for Reconfig Guidelines for Removing Cells” for details on when to perform a reboot for reconfig.

   This reboot for reconfig enables the cell removal to complete and the Complex Profile to be unlocked.

   If you have removed an active cell and you did not specify the -B option to parmodify, then the nPartition will remain inactive in the shutdown for reconfig state after you perform the reboot for reconfig. To make the inactive nPartition active, use the BO (boot) command at the service processor Command menu.

Procedure 6-9 Removing Cells from an nPartition (Partition Manager)

You can remove cells from an nPartition by using Partition Manager.

When using Partition Manager Version 1.0, select an nPartition, and use the PartitionModify Partition action, Add/Remove Cells tab.

When using Partition Manager Version 2.0, select an nPartition, and use the nPartitionModify nPartition action, Add/Remove Cells tab.

1. Access Partition Manager.

   For details on accessing Partition Manager or other tools, see “Tools for Configuring nPartitions”.

2. Select the nPartition from which you want to remove cells.

3. Specify for Partition Manager to remove one or more cells from the nPartition.

   From Partition Manager Version 1.0, use the PartitionModify Partition action and select the Add/Remove Cells tab. To remove cells from the nPartition, select the cells from the "Cells in the Partition" list and click the Remove button.

   From Partition Manager Version 2.0, use the nPartitionModify nPartition action and select the Add/Remove Cells tab. To remove cells from the nPartition, click on the checkbox for the cells so that no checkmark appears (the checkbox is empty).

4. After specifying that the cells be removed from the nPartition, click the OK button.

5. Review all information presented in the Notes and Warnings, the Summary of Changes, and the HA Checks tabs.

6. Either check or leave unchecked the option for booting the nPartition after the reconfiguration occurs.

   For Partition Manager Version 1.0, this option is the Automatically boot partition... checkbox. For Partition Manager Version 2.0, this option is the Boot nPartition to system firmware... checkbox.

   If removing an active cell, leaving this option unchecked (not selected) results in the nPartition being inactive after its reboot for reconfig occurs.

   If removing a cell from an inactive nPartition, selecting this option results in the nPartition becoming active after its reconfiguration occurs.

7. Either cancel or proceed with the changes (the removal of cell).

   Click the Cancel button to cancel the changes.

   To proceed with removing the cells, click the Finish button or click the OK button.

8. As needed, perform a reboot for reconfig on the modified nPartition (HP-UX: shutdown -R; Windows: shutdown /r; Linux: shutdown -r time; OpenVMS: @SYS$SYSTEM:SHUTDOWN with an automatic system reboot).

   • If you have removed only inactive cells from an nPartition, then you do not need to perform a reboot for reconfig of the nPartition.

   • If you have removed any active cells from the nPartition, then you must perform a reboot for reconfig and will have seen a detailed message about rebooting from Partition Manager.

     Issue the reboot for reconfig command.

     If you did not select the option for automatically booting the nPartition to system firmware, then the nPartition is inactive (at the shutdown for reconfig state) after the reboot for reconfig occurs. In this situation, you can make the nPartition active by using the BO command at the service processor Command Menu.