ut(4) - NetBSD Manual Pages

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


NAME

     ut -- UNIBUS TU45 tri-density tape drive interface


SYNOPSIS

     ut0 at uba0 csr 0172440 vector utintr
     tj0 at ut0 drive 0


DESCRIPTION

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

     The ut interface provides access to a standard tape drive interface as
     describe in vax/mtio(4).  Hardware implementing this on the VAX is typi-
     fied by the System Industries SI 9700 tape subsystem.  Tapes may be read
     or written at 800, 1600, and 6250 BPI.


DIAGNOSTICS

     tj%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.

     tj%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.

     tj%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.

     ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b.  The formatter indicated
     a corrected error at a density other than 800bpi.  The data transferred
     is assumed to be correct.

     ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b.  A tape error occurred
     at block

     bn.  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.

     tj%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

     vax/mt(1), vax/mtio(4)


HISTORY

     The ut driver appeared in 4.2BSD.


BUGS

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

NetBSD 10.1                    February 17, 2017                   NetBSD 10.1