clustering nfs

Hello everyone,

It is a pleasure to have these discussion networks, Well, today I am writing beacuse I need to know how to can aggregate a new resource into cluster nfs from redhat suite cluster, currently I need to create a resource lvm but the vg where is mounted seem be locked,
My question is if to create that lvm of that vg that is blocked I must unblock the vg or if you should use another type of command.

thank for read me

Regards.

Lizeth