Add Resource Group Wizard - Volume Group

Use this page to define and configure one or more shared volume groups and configure NFS mounts and exports to be available for use by the resource group.

A shared volume group is a volume group that resides 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. 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 NFS exports
Select one or more volume groups from the list that you want to define as part of the resource group. You can then select the file systems and NFS exported file systems on that volume group that you want to be available when the resource group goes online.
Edit Filesystems 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 choose which file systems and which NFS export file systems to include as part of the resource group. All file systems that are accessible to all the nodes in the resource group are listed. By default, all file systems are selected to be included in the resource group. Consequently, you must deselect 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 at only one node at a time and only if the associated file system is also selected. If you select any NFS export file systems, you also must provide additional configuration information on the Volume Groups page.

NFS version for exports
Select the NFS export protocol that you want to use for all NFS file systems included in the resource group. Which protocol you can select depends on how many nodes are in the resource group. The default selection is NFS V2/3 for the export protocol if the resource group has 2 or fewer nodes. If the resource group has more than two nodes, you can select only NFS V4 for the export protocol. Whichever protocol you select, it is the only protocol that is used to export any and all 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 a list of those available file systems that are managed by the resource group and accessible to all the nodes in the resource group. Alternately, 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, which requires a stable storage location to save state information. This state information is used on recovery after a fallover.
NFS mounts
Specify a list of all file systems / 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_Filesystem is /mnt/fs1, enter /nfsmount/share1;/mnt/fs1.

All nodes in the resource chain will attempt to NFS mount these 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 NFS-mount the 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 is to attempt 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, and if 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 filesystems an 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 choose which file systems and which NFS export file systems to include as part of the resource group.