UT(4) BSD/vax Kernel Interfaces Manual UT(4)NAMEut — UNIBUS TU45 tri-density tape drive interface
controller ut0 at uba0 csr 0172440 vector utintr
tape tj0 at ut0 drive 0
The ut interface provides access to a standard tape drive interface as
describe in mtio(4). Hardware implementing this on the VAX is typified
by the System Industries SI 9700 tape subsystem. Tapes may be read or
written at 800, 1600, and 6250 BPI.
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
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
bn. Any error is fatal on non-raw tape; when possible the driver will
have retried the operation which failed several times before reporting
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 ALSOmt(1), mtio(4)HISTORY
The ut driver appeared in 4.2BSD.
May hang if a physical error (non-data) occurs.
4.2 Berkeley Distribution June 5, 1993 4.2 Berkeley Distribution