The previous VM2000 commands for operating a VM take into account VM definitions as follows:
When a VM is initialized, a VM definition is created for it. When a persistent VM is initialized, a persistent VM definition is also created for it.
 | If the VM definition cannot be created (SU /390 only), the VM is not initialized (irrespective of the PERSISTENT attribute). |
VM2000 commands which modify the configuration (e.g. /ADD-VM-DEVICES) or the status (e.g. /HOLD-VM) of a VM which has already been installed also result in the VM definition being updated.
 | If the VM definition cannot be updated (SU /390 only), a warning is issued. The update of the VM definition is performed automatically at a later time. |
The VM2000 administrator and VM administrators with ADMIN-PRIVILEGES=*MAXIMUM can use /MODIFY-VM-ATTRIBUTES to assign and remove the PERSISTENT attribute to/from a VM which has already been initialized.
When a VM is terminated with /DELETE-VM, the VM definition of a persistent VM is retained. The VM definition of a non-persistent VM is deleted.
 | If the VM definition cannot be deleted (SU /390 only), a warning is issued. The deletion of the VM definition is performed automatically at a later time. |