Nice to have a rl man page also. (Where did the old one go?)
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.\" $NetBSD: rl.4,v 1.1 2000/04/22 17:40:28 ragge Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)hk.4 8.1 (Berkeley) 6/5/93
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.\"
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.Dd April 22, 2000
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.Dt RL 4 vax
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.Os
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.Sh NAME
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.Nm rl
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.Nd
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.Tn RL11 Ns / Tn RL01
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and
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.Tn RL02
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disk interface
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.Sh SYNOPSIS
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.Cd "rlc0 at uba? csr 0177440"
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.Cd "rl0 at rlc0 drive 0"
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.Cd "rl* at rlc? drive ?"
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.Sh DESCRIPTION
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The
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.Nm rl
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driver
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is a typical block-device disk driver; block device
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.Tn I/O
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is
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described in
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.Xr physio 4 .
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.Pp
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The script
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.Xr MAKEDEV 8
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should be used to create the special files; if a special file
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needs to be created by hand consult
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.Xr mknod 8 .
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.Sh FILES
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.Bl -tag -width /dev/rrl[0-7][a-h] -compact
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.It Pa /dev/rl[0-7][a-h]
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block files
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.It Pa /dev/rrl[0-7][a-h]
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raw files
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "rl%d: operation incomplete"
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The current command to the disk did not complete within the timeout period.
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This may be due to hardware failure or a heavily loaded Unibus.
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.It "rl%d: read data CRC"
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The controller detected a CRC error on data read from the disk. Probably
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a bad disk pack.
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.It "rl%d: header CRC"
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The controller detected a CRC error on header data read from the disk.
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Probably a bad disk pack.
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.It "rl%d: data late"
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The controller was not able to transfer data over the bus fast enough to
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not overflow/underflow the internal FIFO, probably because a heavily
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loaded Unibus or mis-ordered Unibus devices.
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.It "rl%d: header not found"
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The requested sector was not found before the timer expired. If this error
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is the only error then it may indicate a software bug.
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.It "rl%d: non-existant memory"
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The controller tried to do DMA to/from a non-mapped address. This is a
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software bug.
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.It "rl%d: memory parity error"
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The host memory data sent had a parity error. This is a hardware failure.
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.Sh SEE ALSO
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.Xr hp 4 ,
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.Xr uda 4 ,
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.Xr up 4 ,
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.Xr syslogd 8
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.Sh HISTORY
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The
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.Nm
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driver has been around nearly forever.
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.br
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A complete new
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.Nm
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driver showed up in
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.Nx 1.5 .
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.Sh BUGS
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Error handling is less than optimal.
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.Pp
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Seeks should be interleaved between multiple disks.
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