InfoScale™ 9.0 Cluster Server Bundled Agents Reference Guide - Solaris

Using the DiskGroup agent with NFS

If the file systems on the VxVM volumes are shared using NFS, you must make sure that the major number of all the volumes across the cluster nodes are consistent. By making the vxio driver numbers consistent for all nodes in a VCS cluster, it makes volume major numbers consistent on all the cluster nodes.

NFS clients know the major and minor numbers of the block device containing the file system exported by the NFS server, so when making the NFS server highly available, it is important to make sure that all nodes in the cluster that can act as NFS servers have the same major and minor numbers for the volume block device.

To determine the current value assigned to the vxio and vxspec drivers, enter:

# grep '^vx' /etc/name_to_major

The following output is displayed:

..
vxio 327
vxspec 328
..

To determine the major numbers available on the system, check the /etc/name_to_major file and use the unassigned numbers.

To reassign the major numbers to the vxio and vxspec drivers, enter:

# haremajor -vx major-number-vxio major-number-vxspec

For example:

# haremajor -vx 338 339

haremajor 1.1

Using the following major number(s):
  338
  339
Do you want to continue [y/n]? y

Updating /etc/name_to_major

If there are any problems, you can backout the changes by restoring the
following files:

- /etc/name_to_major.off.3409

To complete re-majoring, reboot your machine with the following command:
reboot

For more information, refer to the haremajor command manual page.