Become superuser or assume an equivalent role.
sar1% allocate st0
You can also allocate a device by device type by using the -g option to the allocate command.
If the command cannot allocate the device, an error message is displayed in the console window. For a list of allocation error messages, see the allocate(1) man page.
sarl% allocate /dev/lp/chestnut
Only the user who ran the allocate command can use the printer.