Create Resource Group Wizard: Volume group

Use this page to select one or more volume groups for the resource group. You also can configure Network file system (NFS) mounts and exports to be available for use by the resource group.

A shared volume group is a volume group that is located entirely on the external disks that are shared by the cluster nodes associated with the resource group. A file system is written to a single logical volume. Network File System (NFS) is a distributed file system for computer networks that is independent of operating system, type of system, and network architecture.

Fields

Choose volume groups, file systems, and Network File System (NFS) exports
Select one or more volume groups from the list that you want to define as part of the resource group. You can deselect the file systems and NFS exported file systems on the volume group that is to be available when the resource group goes online.
Version of Network File System exports
Select the Network File System (NFS) export protocol that you want to use for all NFS file systems included in the resource group. You can select the protocol based on the number of nodes in the resource group. The default selection is NFS V2/3 for the export protocol if the resource group has two or fewer nodes. If the resource group has more than two nodes, you can select only NFS V4 for the export protocol. The protocol you select is used to export all the NFS file systems included in the resource group. If you select NFS V4, you must also specify the Stable storage path.
Stable storage path (NFS V4)
Select a file system from the available file systems that are managed by the resource group and that are accessible to all the nodes in the resource group. Alternatively, you can specify a file system manually; however, the file system that you specify cannot be an NFS exported file system. You must specify a file system to use as the stable storage path when you select NFS V4 as the NFS version for exports property. NFS V4 requires a stable storage location to save state information. This state information is used for recovery after a fallover.
NFS mounts
Specify the file systems or directories managed by the resource group that you want to allow all nodes in the resource chain to attempt to mount. Use the syntax NFS_Mount_Point;Local_Filesystem, where NFS_Mount_Point is the location where the NFS file system is to be mounted and Local_Filesystem is the file system to export. For example, if the NFS mount point is /nfsmount/share1 and the local file system is /mnt/fs1, enter /nfsmount/share1;/mnt/fs1.

All nodes in the resource chain attempt to mount these network file systems or directories while the owner node is active in the cluster. This optional configuration provides uniform access to the underlying file systems on all the nodes of the resource group.

Preferred network for NFS mounts
Select the preferred network to mount the network file systems. This information is required only when you specify file systems for the NFS mounts field.
Use forced varyon
Selecting Yes for this option specifies that PowerHA® SystemMirror attempts a forced vary-on operation for all volume groups in the resource group. This attempt is made in the event that a normal vary-on operation for the volume group fails due to a lack of quorum. It also is made when PowerHA SystemMirror finds at least one complete copy of every logical volume for this volume group. This option is only meaningful for volume groups in which every logical volume is mirrored. The default selection for this option is No.

Actions

Edit File Systems and NFS Exports
After selecting a volume group, click this link in the File Systems column of the table to open the Choose File Systems and NFS exports window. In this window, you can select which file systems and which NFS export file systems to include as part of the resource group. The window lists all file systems that are accessible to all the nodes in the resource group. By default, all file systems are selected to be included in the resource group. Consequently, you must clear any file systems that you do not want to make available to the resource group when the resource group goes online. You must explicitly select any NFS export file systems that you want to be available to the resource group when it is goes online.
NFS export file systems are available for selection only if the resource group is online with only one node at a time, and only if you also selected the associated file system. If you select any NFS export file systems, you also must provide additional configuration information for the Volume Groups page.