1.4.4 Creating rootdg

After loading the CVM software, you must create the default disk group, rootdg. One approach is to place the root disk under CVM control through the process of encapsulation. The disk group resulting from the encapsulation will then become the rootdg disk group. However, if frequent upgrades to this package are anticipated, this may not be convenient because it is more difficult to upgrade to new versions or recover from certain errors when the root disk is encapsulated. If you do not wish to encapsulate the root disk, you can encapsulate any other disk using vxinstall to create the rootdg (required for CVM to come up. Another approach is to create a simple volume manager disk (on a partition of a disk that is not shared and has not been encapsulated) and then use this for rootdg.

This section describes how to create the root disk group by using encapsulation; we do not recommend using the simple disk approach. After creating rootdg, go to "1.4.5 Configuring Shared Disks".

1.4.4.1 Encapsulating Your Root Disk

To encapsulate your root disk, create rootdg as follows:

1. Invoke vxinstall and follow the instructions in the "Custom Installation" section of the Sun StorEdge Volume Manager 2.6 Installation Guide to encapsulate only the root disk.

   For all other disks, select the Leave these disks alone option.

2. After using vxinstall to encapsulate the root disk, reboot the system.

   The vxinstall command will automatically create rootdg.