SPARC: How to Add a Node to a Disk Device Group (VERITAS Volume Manager)

This procedure adds a node to a disk device group using the scsetup(1M) utility.

The prerequisites to add a node to a VxVM disk device group are:

• Superuser privilege on a node in the cluster

• The name of the VxVM device group to which the node will be added

• The name or node ID of the nodes to add

1. Become superuser on any node of the cluster.

2. At the prompt, type the scsetup command.

   # scsetup

   
   The Main Menu is displayed.

3. To work with VxVM disk device groups, type 4 (Device groups and volumes).

   The Device Groups Menu is displayed.

4. To add a node to a VxVM disk device group, type 4 (Add a node to a VxVM device group).

   Follow the instructions and enter the device group and node names.

5. Verify that the node has been added.

   Look for the device group information for the new disk displayed by the following command.

   # scconf -p

   
   

SPARC: Example--Adding a Node to a VERITAS Volume Manager Disk Device Group

The following example shows the scconf command generated by scsetup when it adds a node (phys-schost-3) to a VxVM disk device group (dg1), and the verification step.

# scsetup
 
scconf a D type=vxvm,name=dg1,nodelist=phys-schost-3
  
# scconf -p
Device group name:                dg1
   Device group type:             VXVM
   Device group failback enabled: yes
   Device group node list:        phys-schost-1, phys-schost-3

SPARC: How to Remove a Node From a Disk Device Group (VERITAS Volume Manager)

Use this procedure to remove a cluster node from the list of potential primaries of a VERITAS Volume Manager (VxVM) disk device group (disk group).

1. Verify that the node is still a member of the group and that the group is an VxVM device group.

   Device group type VxVM indicates a VxVM disk device group.

   phys-schost-1% scconf -pv | grep '(global-galileo)' (global-galileo) Device group type: VxVM (global-galileo) Device group failback enabled: no (global-galileo) Device group node list: phys-schost-1, phys-schost-2 (global-galileo) Diskset name: global-galileo phys-schost-1%

   
   

2. Become superuser on a current cluster member node.

3. Execute the scsetup(1M) command.

   # scsetup

   
   

   The Main Menu is displayed.

4. To reconfigure a disk device group, type 4 (Device groups and volumes).

5. To remove the node from the VxVM disk device group, type 5 (Remove a node from a VxVM device group).

   Follow the prompts to remove the cluster node from the disk device group. You will be asked for information about the following:

   • VxVM device group

   • Node name

6. Verify that the node has been removed from the VxVM disk device group(s).

   # scconf -p | grep Device

   
   

SPARC: Example--Removing a Node From a Disk Device Group (VxVM)

This example shows removal of the node named phys-schost-1 from the dg1 VxVM disk device group.

[Determine the VxVM disk device group for the node:]
# scconf -p | grep Device
  Device group name:                 dg1
    Device group type:               VxVM
    Device group failback enabled:   no
    Device group node list:          phys-schost-1, phys-schost-2
    Device group diskset name:    	dg1
[Become superuser and execute the scsetup utility:]
# scsetup
 Select Device groups and volumes>Remove a node from a VxVM device group.
Answer the questions when prompted. 
You will need the following information.
  You Will Need:            Example:
  VxVM device group name    dg1
  node names                phys-schost-1
[Verify that the scconf command executed properly:]
 
scconf -r -D name=dg1,nodelist=phys-schost-1
 
    Command completed successfully.
Quit the scsetupDevice Groups Menu and Main Menu.
[Verify that the node was removed:]
# scconf -p | grep Device
  Device group name:                 dg1
    Device group type:               VxVM
    Device group failback enabled:   no
    Device group node list:          phys-schost-2
    Device group diskset name:    	dg1