REWind



   1.0  Description


        REW is a program to rewind a magnetic tape drive without taking the
   drive  offline.   It  is  intended  to  be  used as an MCR command only,
   similar to UFD.  REW will initiate  the  drive  rewind  and  then  exit;
   although  it has been observed with the MS driver that REW will not exit
   until the tape is done rewinding.  I have not taken the time  to  figure
   out  why.   (The driver documentation says it should return from the QIO
   as soon as the rewind is initiated but not completely rewound.  This  is
   the case for the MT driver.)



   2.0  Use


        The command structure for REWind can be either one of two formats:

           >REW [n]           Where n is the tape drive unit number and  is
           _
                              optional.   REW  will  search  for  the first
                              occurance of one of  the  following  magnetic
                              tape  drives  and  then attempt to rewind it:
                              MT, MS, MM, MF, DD.

           >REW dd[n][:]      Where dd is the tape drive device mnemonic, n
           _
                              is  the optional unit number and the colon is
                              entirely optional.