HOWTO:: Add and Configure LUNs in Solaris 9 and Veritas Cluster

Do you have a Veritas Cluster? Do you know how to configure a LUN and increase the size of a volume that is managed by Veritas Cluster?
Of course not… Read on…

This HOWTO assumes you have 2 servers to each database that are part of Veritas Cluster and that the databases are running on node 1 and that you are using Emulex HBAs.
ON BOTH NODES

Step 1. Make a copy of the output when you run format

Step 2. Edit /kernel/drv/sd.conf and add an entry for the LUNs you are adding
name="sd" parent="lpfc" target=17 lun=42 hba="lpfc0";

Step 3. Run the following commands so that Solaris can see the new LUNs as disks.
#> update_drv -f sd#> devfsadm

Step 4. Run format and select the new disks. It should show up as c3t17dxx. Select that disk and label it when asked. Do this for all added LUNs.

Step 5. Run vxdiskadm. Select 1. Add or initialize one or more disks. You can type list now to view all of the disks that Veritas Cluster currently sees. The uninitialized ones will be labeled as such. Type in the c3t17dxx designation to select it and accept all of the default except for the following:
When it asks for the disk group, enter the name of the disk group that contains the volume that you wish to increase its size When it asks if you would like to encapsulate the disk, say no. You will then be prompted to initialize, say yes.

Step 6. Make a note of the disk designations that Veritas Cluster provides (ex: mydisk12)

Step 7. Run vxassist to get an idea if the disk initialization really worked as expected. This will allow you to see the maximum amount of space the volumes can be expanded:
#> vxassist -g mydiskgroup maxgrow myvolume mydisk##
It will show you the maximum size that the volume can be expanded in clusters and MB.

Step 8. It is now a good idea to get a copy of the current sizes of the disks. You will need this later. So do a df -th and record the sizes of the volumes you are wanting to expand.

Step 9. Grow the filesystems you need by issuing the following command:
/etc/vx/bin/vxresize -F vxfs -g mydiskgroup myvolume +42g mydisk##
Step 10. Compare the output of df -th to the copy you saved earlier (or scroll up for all you non-hackers)
That’s it. That’s all there is to it… now get off my back.