Perform the following steps to remove an SP expansion I/O unit from an existing node.
Before removing an SP expansion I/O unit from an existing node, you should back up the SDR by issuing:
Note the location and the name of the file created after you issue this command.
Prior to shutting down the node that you are deleting the SP expansion I/O unit from, make a list of all the applications and programs running on the node (such as LoadLeveler) and stop them from running.
Use Perspectives or the cshutdown command to shut down the nodes. For example, issue:
cshutdown -G -N 45
Your IBM Customer Engineer (CE) performs this step. See RS/6000 SP: Installation and Relocation for instructions.
Use the spdelexp command on the control workstation to remove an SP expansion I/O unit definition from the SDR. For example, issue:
spdelexp -x 4,5,7
Power on the node using the cstartup command. For example:
cstartup -G -N 45