4.4BSD/usr/share/man/cat4/vax/ht.0

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HT(4)             BSD Programmer's Manual (VAX Architecture)             HT(4)

NNAAMMEE
     hhtt - TM-03/ TE-16, TU-45, TU-77 MASSBUS magtape device interface:

SSYYNNOOPPSSIISS
     mmaasstteerr hhtt00 aatt mmbbaa?? ddrriivvee ??
     ttaappee ttuu00 aatt hhtt00 ssllaavvee 00

DDEESSCCRRIIPPTTIIOONN
     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.

DDIIAAGGNNOOSSTTIICCSS
     ttuu%%dd:: nnoo wwrriittee rriinngg..  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.

     ttuu%%dd:: nnoott oonnlliinnee..  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.

     ttuu%%dd:: ccaann''tt cchhaannggee ddeennssiittyy iinn mmiidd--ttaappee..  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.

     ttuu%%dd:: hhaarrdd eerrrroorr bbnn%%dd mmbbssrr==%%bb eerr==%%bb ddss==%%bb..  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.

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

HHIISSTTOORRYY
     An hhtt driver appeared in Version 6 AT&T UNIX.

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

4th Berkeley Distribution        June 5, 1993                                1