The vtAlpha emulator allows several parameters to be specified for
 	logical tape devices. The TAPEMGR utility can be used to create,
 	delete or change container files, and to select the format used
 	to read or write these files.

 	The utility needs OPER and CMKRNL privileges (except for the HELP
 	and VERSION commands).

 	This utility can also be activated with the command 'AVTAPEMGR'.