Veritas Volume Manager- Important handy commands

1. Unable to import diskgroup:

Their may be many reasons for which you may not be able to import the diskgroup however the diskgroup shows clean in vxdisk -o alldgs list

One common reason is the diskgroup was not deported cleanly . Use the below commands to fix the issue

#vxdg -f -C import appdg -- which will clean up the existing host id and import the diskgroup


2. A quick way to check which are the volumes in a diskgroup have been started


#vxinfo -g


# vxinfo -g datadg
datavol        fsgen    Startable


In the above output, the last field "startable" means volume is fine can be started by the following commands


# vxvol -g datadg start datavol
# vxinfo -g datadg
datavol        fsgen    Started
#



Using vxprint also you can also get the status of the volumes


#vxprint -qhtg




Below steps are used for SAN migration. Its very simple.


Attaching a plex:

# vxplex -g appdg att appvol appvol-01

Removing a plex:

-- If above looks good, then go ahead & detach old plex
# vxmend -g testdg off oradata9-01
# vxplex -g testdg dis oradata9-01

remove the plex

# vxedit -g -rf rm   --- delete the plex

remove the disk from diskgroup

# vxdg -g appdg rmdisk disk01




Forcibly starting a disabled volume:

# vxvol -g mydg -o bg -f start myvol

Clearing the failing flag on a disk

Failing flag could be because of many reasons such as intermittent I/O error which could be because of temporary removal of a cable, controller fault, partially faulty LUN in the array.

#vxedit set failing=off mydg02