You can't proceed to try to use devices which are not in an Available (Disponible) state: Definido (Defined) is insufficient. It may mean that the device is not powered on or there's a device driver incompatibility in talking to the device. Make sure you are using consistent bitmode software (32 vs. 64). Refer to your AIX Error Log for definitive error indications. Pursue the issue to conclusion at the OS level before trying to operate on the hardware through an application like TSM. Make use of 'tapeutil' or like commands to assure functionality.
On the TSM Support Page, search on: "define path" 3583 to get some further information. Richard Sims
