The pool_tool command can be used to change the name of a pool.
pool_tool -r NewPoolName CurrentPoolName
Specifies the new name of the pool.
Specifies the pool name to be changed.
In releases before GFS 5.2, the -r flag had a different usage.
You must deactivate a pool before renaming it. You can deactivate a pool with the pool_assemble -r PoolName command or by using the pool init.d script. For more information about GFS init.d scripts, refer to Chapter 12 Using GFS init.d Scripts.
This example changes the name for pool mypool to pool0:
pool_tool -r pool0 mypool