How can an administrator rename hdisk2 to cldisk1?

chpv modifies physical volume characteristics such as allocation permission and reserve policy, but does not rename devices.

The rendev command with -l (logical device name) and -n (new name) is the correct AIX mechanism to rename a device, updating its entry in the ODM (Object Data Manager) permanently. Executing 'rendev -l hdisk2 -n cldisk1' changes the device name from hdisk2 to cldisk1 system-wide without requiring a reboot.

clcmd is a PowerHA cluster command used to run commands across cluster nodes; it is not a device management utility.

chdev modifies device attributes stored in the ODM, but the logical device name itself cannot be changed via chdev - that requires the dedicated rendev command.