Silicon Graphics IRIS Workstation, Руководство пользователя

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October 1984 - 1 - Version 1.0
MT(4) Silicon Graphics MT(4)
NAME
mt - TM78/TU-78 MASSBUS magtape interface
SYNOPSIS
master mt0 at mba? drive ?
tape mu0 at mt0 slave 0
DESCRIPTION
The tm78/tu-78 combination provides a standard tape drive interface as
described in smtio (4). Only 1600 and 6250 bpi are supported; the TU-78 runs
at 125 ips and autoloads tapes.
SEE ALSO
mt(1), tar(1), tp(1)
DIAGNOSTICS
mu%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.
mu%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.
mu%d: can’t switch 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 mes-
sage is written on the terminal of the user who tried to switch the density.
mu%d: hard error bn%d mbsr=%b er=%x ds=%b . A tape error occurred
at block bn ; the mt 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 retry the operation which failed several times
before reporting the error.
mu%d: blank tape . An attempt was made to read a blank tape (a tape
without even end-of-file marks).
mu%d: offline . During an I/O operation the device was set offline. If a
non-raw tape was used in the access it is closed.
BUGS
If any non-data error is encountered on non-raw tape, it refuses to do any-
thing more until closed.