ht(4) - NetBSD Manual Pages

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HT(4)                 NetBSD/vax Kernel Interfaces Manual                HT(4)


NAME

     ht -- TM-03/ TE-16, TU-45, TU-77 MASSBUS mag tape device interface:


SYNOPSIS

     ht0 at mba? drive ?
     tu0 at ht0 slave 0


DESCRIPTION

     NOTE: This driver has not been ported from 4.4BSD yet.

     The TM-03 transport combination provides a standard tape drive interface
     as described in vax/mtio(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.


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 bn; 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.


SEE ALSO

     tar(1), vax/mt(1), physio(4), vax/mt(4), vax/mtio(4), vax/tm(4),
     vax/ts(4), vax/ut(4)


HISTORY

     An ht driver appeared in Version 6 AT&T UNIX.


BUGS

     May hang if physical (non-data) errors occur.

NetBSD 10.0                    February 17, 2017                   NetBSD 10.0