2.9BSD/usr/man/cat4/ht.4

HT(4)               UNIX Programmer's Manual                HT(4)

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

DESCRIPTION
     The TM-03/transport combination provides a standard tape
     drive interface as described in _m_t(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), mt(4), tm(4), ts(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 termi-
     nal of the user who tried to access the tape.

     tu%d: can't switch 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 termi-
     nal of the user who tried to switch the density.

     tu%d: hard error bn%d 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.

     The system should remember which controlling terminal has
     the tape drive open and write error messages to that termi-
     nal rather than on the console.

Printed 5/17/83                                                 1