HT(4)                                                                    HT(4)



NAME
       ht - TM-03/TE-16,TU-45,TU-77 MASSBUS magtape interface

SYNOPSIS
       master ht0 at mba? drive ?
       tape tu0 at ht0 slave 0

DESCRIPTION
       The  tm-03/transport  combination provides a standard tape drive inter‐
       face as described in _m_t_i_o(4).  All drives provide  both  800  and  1600
       bpi;  the  TE-16  runs  at 45 ips, the TU-45 at 75 ips, while the TU-77
       runs at 125 ips and autoloads tapes.

SEE ALSO
       mt(1), tar(1), tp(1), mtio(4), tm(4), ts(4), mt(4), ut(4)

DIAGNOSTICS
       tu%d: no write ring.  An attempt was made to write on  the  tape  drive
       when no write ring was present; this message is written on the terminal
       of the user who tried to access the tape.

       tu%d: not online.  An attempt was made to access the tape while it  was
       offline;  this message is written on the terminal of the user who tried
       to access the tape.

       tu%d: can’’t change density in mid-tape.  An attempt was made  to  write
       on  a tape at a different density than is already recorded on the tape.
       This message is written on the terminal of the user who tried to switch
       the density.

       tu%d:  hard  error bn%d mbsr=%b er=%b ds=%b.   A tape error occurred at
       block _b_n; the ht error register and drive status register  are  printed
       in  octal  with  the  bits symbolically decoded.  Any error is fatal on
       non-raw tape; when possible the driver will have retried the  operation
       which failed several times before reporting the error.

BUGS
       If  any non-data error is encountered on non-raw tape, it refuses to do
       anything more until closed.



4th Berkeley Distribution        June 1, 1986                            HT(4)