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TM(4)		       BSD/vax Kernel Interfaces Manual			 TM(4)

NAME
     tm — TM-11/ TE-10 magtape device interface

SYNOPSIS
     controller tm0 at uba? csr 0172520 vector tmintr tape te0 at tm0 drive 0

DESCRIPTION
     The TM-11/ TE-10 combination provides a standard tape drive interface as
     described in mtio(4).  Hardware implementing this on the VAX is typified
     by the Emulex TC-11 controller operating with a Kennedy model 9300 tape
     transport, providing 800 and 1600 BPI operation at 125 IPS.

DIAGNOSTICS
     te%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.

     te%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.

     te%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.

     te%d: hard error bn%d er=%b.  A tape error occurred at block bn; the tm
     error register is 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.

     te%d: lost interrupt.  A tape operation did not complete within a reason‐
     able time, most likely because the tape was taken off-line during rewind
     or lost vacuum.  The controller should, but does not, give an interrupt
     in these cases.  The device will be made available again after this mes‐
     sage, but any current open reference to the device will return an error
     as the operation in progress aborts.

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

HISTORY
     A tm driver appeared in Version 6 AT&T UNIX.

BUGS
     May hang if a physical (non-data) error occurs.

4th Berkeley Distribution	 June 5, 1993	     4th Berkeley Distribution
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