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Annotation of 43BSDTahoe/man/man4/vax/mt.4, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)mt.4        6.3 (Berkeley) 6/1/86
        !             6: .\"
        !             7: .TH MT 4 "June 1, 1986"
        !             8: .UC 4
        !             9: .SH NAME
        !            10: mt \- TM78/TU-78 MASSBUS magtape interface
        !            11: .SH SYNOPSIS
        !            12: .B master mt0 at mba? drive ?
        !            13: .br
        !            14: .B tape mu0 at mt0 slave 0
        !            15: .SH DESCRIPTION
        !            16: The tm78/tu-78 combination provides a standard tape drive
        !            17: interface as described in
        !            18: .IR mtio (4).
        !            19: Only 1600 and 6250 bpi are supported; the
        !            20: TU-78 runs at 125 ips and autoloads tapes.
        !            21: .SH "SEE ALSO"
        !            22: mt(1),
        !            23: tar(1),
        !            24: tp(1),
        !            25: mtio(4),
        !            26: tm(4),
        !            27: ts(4),
        !            28: ut(4)
        !            29: .SH DIAGNOSTICS
        !            30: \fBmu%d: no write ring\fR.  An attempt was made to write on the tape drive
        !            31: when no write ring was present; this message is written on the terminal of
        !            32: the user who tried to access the tape.
        !            33: .PP
        !            34: \fBmu%d: not online\fR.  An attempt was made to access the tape while it
        !            35: was offline; this message is written on the terminal of the user
        !            36: who tried to access the tape.
        !            37: .PP
        !            38: \fBmu%d: can't change density in mid-tape\fR.  An attempt was made to write
        !            39: on a tape at a different density than is already recorded on the tape.
        !            40: This message is written on the terminal of the user who tried to switch
        !            41: the density.
        !            42: .PP
        !            43: \fBmu%d: hard error bn%d mbsr=%b er=%x ds=%b\fR.   A tape error occurred
        !            44: at block \fIbn\fR; the mt error register and drive status register are
        !            45: printed in octal with the bits symbolically decoded.  Any error is
        !            46: fatal on non-raw tape; when possible the driver will have retried
        !            47: the operation which failed several times before reporting the error.
        !            48: .PP
        !            49: \fBmu%d: blank tape\fP.
        !            50: An attempt was made to read a blank tape (a tape without even
        !            51: end-of-file marks).
        !            52: .PP
        !            53: \fBmu%d: offline\fP.
        !            54: During an i/o operation the device was set offline.  If a
        !            55: non-raw tape was used in the access it is closed.
        !            56: .SH BUGS
        !            57: If any non-data error is encountered on non-raw tape,
        !            58: it refuses to do anything more until closed.
        !            59: .PP
        !            60: Because 800 bpi tapes are not supported, the numbering of minor devices
        !            61: is inconsistent with triple-density tape units.
        !            62: Unit 0 is drive 0, 1600 bpi.

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