ut(4) Unsupported ut(4)Nameut - UNIBUS TU45 tri-density tape drive interface
Syntax
controller ut0 at uba0 csr 0172440 vector utintr
tape tj0 at ut0 drive 0
Description
The interface provides access to a standard tape drive interface as
describe in 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.
Restrictions
If any non-data error is encountered on non-raw tape, it refuses to do
anything more until closed.
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 mes‐
sage 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 reasonable 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 message, but any current
open reference to the device will return an error as the operation in
progress aborts.
See Alsomt(1), mtio(4)
VAX ut(4)
