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+.\" $NetBSD: ct.4,v 1.9 2003/08/07 10:31:05 agc Exp $
+.\"
+.\" Copyright (c) 1990, 1991, 1993
+.\" The Regents of the University of California. All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Systems Programming Group of the University of Utah Computer
+.\" Science Department.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" from: @(#)ct.4 8.1 (Berkeley) 6/9/93
+.\"
+.Dd June 9, 1993
+.Dt CT 4 hp300
+.Os
+.Sh NAME
+.Nm ct
+.Nd
+.Tn CS/80
+cartridge tape interface
+.Sh SYNOPSIS
+.Cd "ct0 at hpibbus? slave ?"
+.Sh DESCRIPTION
+The cartridge tape interface as found in the 7946 and 9144 products
+provides a standard tape drive interface as described in
+.Xr mtio 4
+with the following exceptions:
+.Bl -enum
+.It
+There is only one density.
+.It
+Only the
+.Dq raw
+interface is supported.
+.It
+The
+.Dv MTIOCTOP
+.Xr ioctl 2
+is limited.
+In particular, the command,
+.Dv MTFSR
+is not supported.
+.It
+The
+.Dv MTIOCGET
+.Xr ioctl 2
+is not supported.
+.It
+The record size for read and write operations must be between
+1K and 64K inclusive.
+.El
+.Pp
+Special files
+.Pa rct0
+through
+.Pa rct3
+refer to rewind on close interfaces to drives 0 to 3.
+Files
+.Pa rct4
+through
+.Pa rct7
+refer to no-rewind interfaces.
+Files
+.Pa rct8
+through
+.Pa rct11
+refer to streaming rewind on close interfaces. (Only 9144 type devices
+can stream.)
+Lastly,
+.Pa rct12
+through
+.Pa rct15
+refer to streaming no-rewind interfaces.
+.Sh SEE ALSO
+.Xr mt 1 ,
+.Xr tar 1 ,
+.Xr mtio 4
+.Sh BUGS
+Read and writes of less than 1024 bytes will not behave as expected.