[Determine the disk device group for the node:]
# scstat -D
  -- Device Group Servers --
                       Device Group  Primary        Secondary
                       ------------  -------        ---------
  Device group servers: dg-schost-1  phys-schost-1  phys-schost-2
[Become superuser and execute the scsetup utility:]
# scsetup
[Select option 3:]
*** Main Menu ***
    Please select from one of the following options:
      ...
      3) Device groups and volumes
      ...
    Option: 3
[Select option 5:]
*** Device Groups Menu ***
    Please select from one of the following options:
      ...
      5) Remove a node from a VxVM device group
      ...
    Option:  5
[Answer the questions to remove the node:]
>>> Remove a Node from a VxVM Device Group <<<
    ...
    Is it okay to continue (yes/no) [yes]? yes
    ...
    Name of the VxVM device group from which you want to remove a node?  dg1
    Name of the node to remove from this group?  phys-schost-4
    Is it okay to proceed with the update (yes/no) [yes]? yes
 
scconf -r -D name=dg1,nodelist=phys-schost-4
 
    Command completed successfully.
    Hit ENTER to continue: 

[Quit the scsetup Device Groups Menu and Main Menu:]
    ...
    Option:  q
[Verify that the node was removed:]
# scstat -D
  ...
  Device group name: 		dg1
  Device group type: 	VxVM
  Device group failback enabled: 	no
  Device group node list: 	phys-schost-3
  Diskgroup name: 	dg1
  ...