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 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

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


HISTORY

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


BUGS

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

NetBSD 5.0                       June 5, 1993                       NetBSD 5.0