How to change quorum devices in Sun Cluster 2.2

[root@server1]#scconf sc-cluster -p
Checking node status...
Current Configuration for Cluster sc-cluster

  Hosts in cluster:
        server1 server2 

  Private Network Interfaces for
        server1:        ce4 ce6
        server2:        ce4 ce6

  Quorum Device Information
Quorum device for hosts server1 and server2: 452B9F07-00

  Logical Host Timeout Value :
        Step10            :720
        Step11            :720
        Logical Host              :180

[root@server1]#scconf sc-cluster -q server1 server2
Checking node status...
Checking host server2 ...server2 is alive

Getting device information for hosts server1 and server2
This may take a few seconds to a few minutes...done
Select quorum device for server1 and server2.
Type the number corresponding to the desired selection.
For example: 1
1) DISK:c7t0d0s2:452B9F07-00
2) DISK:c7t0d1s2:452B9F07-01
3) DISK:c7t0d2s2:452B9F07-02
4) DISK:c7t0d3s2:452B9F07-03
Quorum device: 2
Disk c7t0d1s2 with serial id 452B9F07-01 has been chosen
as the quorum device.

[root@server1]#scconf sc-cluster -p
Checking node status...
Current Configuration for Cluster sc-cluster

  Hosts in cluster:
        server1 server2 

  Private Network Interfaces for
        server1:        ce4 ce6
        server2:        ce4 ce6

  Quorum Device Information
Quorum device for hosts server1 and server2: 452B9F07-01

  Logical Host Timeout Value :
        Step10            :720
        Step11            :720
        Logical Host              :180

---------------

[root@server2/]#scconf sc-cluster -p
Checking node status...
Current Configuration for Cluster sc-cluster

  Hosts in cluster:
        server1 server2 

  Private Network Interfaces for
        server1:        ce4 ce6
        server2:        ce4 ce6

  Quorum Device Information
Quorum device for hosts server1 and server2: 452B9F07-00

  Logical Host Timeout Value :
        Step10            :720
        Step11            :720
        Logical Host              :180

[root@server2/]#scconf sc-cluster -q server1 server2
Checking node status...
Checking host server1 ...
server1 is alive

Getting device information for hosts server1 and server2
This may take a few seconds to a few minutes...done
Select quorum device for server1 and server2.
Type the number corresponding to the desired selection.
For example: 1
1) DISK:c8t0d0s2:452B9F07-00
2) DISK:c8t0d1s2:452B9F07-01
3) DISK:c8t0d2s2:452B9F07-02
4) DISK:c8t0d3s2:452B9F07-03
Quorum device: 2
Disk c8t0d1s2 with serial id 452B9F07-01 has been chosen
as the quorum device.

[root@server2/]#scconf sc-cluster -p
Checking node status...
Current Configuration for Cluster sc-cluster

  Hosts in cluster:
        server1 server2 

  Private Network Interfaces for
        server1:        ce4 ce6
        server2:        ce4 ce6

  Quorum Device Information
Quorum device for hosts server1 and server2: 452B9F07-01

  Logical Host Timeout Value :
        Step10            :720
        Step11            :720
        Logical Host              :180