MT_ST_SYSV sets the SYSV semantics (mode)
MT_ST_NOWAIT enables immediate mode (i.e., don't wait for
the command to finish) for some commands (e.g., rewind)
+ MT_ST_NOWAIT_EOF enables immediate filemark mode (i.e. when
+ writing a filemark, don't wait for it to complete). Please
+ see the BASICS note about MTWEOFI with respect to the
+ possible dangers of writing immediate filemarks.
MT_ST_SILI enables setting the SILI bit in SCSI commands when
reading in variable block mode to enhance performance when
reading blocks shorter than the byte count; set this only