321 lines
8.3 KiB
Groff
321 lines
8.3 KiB
Groff
.\"
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.\" Written By Julian ELischer
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.\" Copyright julian Elischer 1993.
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.\" Permission is granted to use or redistribute this file in any way as long
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.\" as this notice remains. Julian Elischer does not guarantee that this file
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.\" is totally correct for any given task and users of this file must
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.\" accept responsibility for any damage that occurs from the application of this
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.\" file.
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.\"
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.\" (julian@tfs.com julian@dialix.oz.au)
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.\" User SCSI hooks added by Peter Dufault:
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.\"
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.\" Copyright (c) 1994 HD Associates
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.\" (contact: dufault@hda.com)
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.\" 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. The name of HD Associates
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.\" may not 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 HD ASSOCIATES ``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 HD ASSOCIATES 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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.\"
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.\" $Id: scsi.8,v 1.15 1997/12/29 21:08:33 brian Exp $
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.\"
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.Dd October 11, 1993
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.Dt SCSI 8
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.Os BSD 4
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.Sh NAME
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.Nm scsi
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.Nd program to assist with scsi devices
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.Sh SYNOPSIS
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.Nm scsi
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.Fl f Ar device
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.Fl d Ar debug_level
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.Nm scsi
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.Fl f Ar device
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.Fl z Ar seconds
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.Op Fl v
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.Nm scsi
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.Fl f Ar device
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.Fl m Ar page
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.Op Fl P Ar pc
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.Op Fl e
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.Nm scsi
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.Fl f Ar device
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.Fl p
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.Op Fl b Ar bus
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.Op Fl l Ar lun
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.Nm scsi
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.Fl f Ar device
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.Fl r
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.Op Fl b Ar bus
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.Op Fl t Ar targ
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.Op Fl l Ar lun
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.Nm scsi
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.Fl f Ar device
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.Fl c Ar cmd_fmt
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.Op Ar arg0 ... argn
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.Op Fl s Ar seconds
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.Op Fl v
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.Fl o Ar count out_fmt
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.Op Ar arg0 ... argn
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.Fl i Ar count in_fmt
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.Sh DESCRIPTION
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The
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.Nm scsi
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program is used to send commands to a scsi device. It is also
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a sample usage of the user level SCSI commands.
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.Pp
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The
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.Fl f
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option must be specified, and
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.Ar device
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must be the name of a functional SCSI device. If the device is a
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disk device, it should be the control device,
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.Pq for example Pa /dev/rsd0.ctl .
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Use the
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.Fl p
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option with the
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.Sq super scsi
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device to reprobe a bus where there are currently no valid devices
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attached.
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.Pp
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The
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.Fl d
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option sets the SCSI kernel debug level. The kernel must have been compiled
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with the
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.Dv SCSIDEBUG
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option. See
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.Pa /sys/scsi/scsi_debug.h
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to figure out what to set the kernel debug level to.
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.Pp
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The
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.Fl z
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option freezes all activity on all SCSI busses for a given number of
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seconds. If
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.Fl v
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is also specified then a BEL character is sent to the standard
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output at the start and finish of the bus freeze.
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This requires that the kernel be built with the
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.Dv SCSI_FREEZE
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kernel option.
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This kernel code is not committed yet.
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.Pp
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The
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.Fl m
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option is used to read a device mode page. The file
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.Pa /usr/share/misc/scsi_modes
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is read to look at for how to interpret the mode data. The environment
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variable
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.Ev SCSI_MODES
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can specify a different file to use.
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.Pp
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The
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.Fl P
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option can be used to specify a page control field. The page control
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fields are:
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.Pp
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.Bl -tag -width xxxx -indent offset -compact
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.It 0
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Current Values
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.It 1
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Changeable Values
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.It 2
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Default Values
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.It 3
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Saved Values
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.El
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.Pp
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The
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.Fl e
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option permits you to edit the fields. It will use the editor specified
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by your
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.Ev EDITOR
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environment variable. To store changes permanently,
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edit page control 3 using the
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.Fl P
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option.
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.Pp
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The
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.Fl p
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option can be used against the
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.Sq super scsi
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device
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.Pa /dev/ssc
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to probe all devices with a given SCSI lun on a given SCSI bus.
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The bus can be selected with the
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.Fl b
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option and the default is 0.
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The lun can be selected with the
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.Fl l
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option and the default is 0.
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.Pp
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The
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.Fl r
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option can be used to reprobe all SCSI devices on all SCSI busses that
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were present at boot-time. See
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.Xr scsi 4
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for a description of fixed scsi devices.
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.Pp
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The
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.Fl c
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option permits you to send user level SCSI commands specified on
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the command line to a
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device. The command is sent using the
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.Dv SCIOCCOMMAND
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ioctl, so the
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device you are accessing must permit this ioctl. See
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.Xr scsi 4
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for full details of which minor devices permit the ioctl, and
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.Xr scsi 3
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for the full details on how to build up the commands and data phases
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using the format arguments.
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.Pp
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.Fl v
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turns on more verbose information.
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.Pp
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.Fl s
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sets the command timeout in seconds. The default is two seconds.
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.Pp
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.Fl c Ar cmd_fmt
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specifies the command as described in
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.Xr scsi 3 "."
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The additional arguments provide values for any variables
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specified in the command format. Note that the arguments to the
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.Fl c
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option are hexadecimal numbers, while all normal arguments on the
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command-line are subject to the common
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.Dq C
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number notation.
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.Pp
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.Fl o
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.Ar count
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.Ar out_fmt
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.Op Ar arg0 ... argn
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indicates that this is a data out command (i.e., data will be sent from
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the system to the device) with
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.Fr count
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bytes of data. The data out is built up using the facilities described in
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.Xr scsi 3
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using the provided arguments to fill in any integer variables.
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.Ar out_fmt
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can be specified as a hyphen ("-") to indicate that the
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.Ar count
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bytes of data should be read from the standard input.
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.Pp
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.Fl i Ar count Ar in_fmt
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indicates that this is a data in command (i.e., data will be read from
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the device into the system) with
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.Ar count
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bytes of data read in. The information is extracted according to
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.Ar in_fmt
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using the facilities described in
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.Xr scsi 3
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and displayed on the standard output.
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.Ar in_fmt
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can be specified as a hyphen ("-") to indicate that the
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.Ar count
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bytes of data input should be written to the standard output.
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.Sh EXAMPLES
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To verify that the device type for the disk
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.Pa /dev/rsd0c
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is 0 (direct access device):
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.Bd -literal -offset indent
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root# scsi -f /dev/rsd0c -c "12 0 0 0 40 0" -i 64 "*b3 b5" 0
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.Ed
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.Pp
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To do an inquiry to
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.Pa /dev/rsd2c :
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.Bd -literal -offset indent
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root# scsi -f /dev/rsd2c -c "12 0 0 0 v 0" 0x40 -i 64 \e
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"s8 z8 z16 z4" FUJITSU M2654S-512 010P
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.Ed
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.Pp
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To edit mode page 1 (the Read-Write Error Recovery Page)
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on
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.Pa /dev/rsd2c ,
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and store it permanently on the
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drive:
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.Bd -literal -offset indent
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root# scsi -f /dev/rsd2c -m 1 -e -P 3
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.Ed
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.Pp
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To simply re-probe the first scsi bus:
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.Bd -literal -offset indent
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root# scsi -f /dev/ssc -p
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.Ed
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.Pp
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.Sh ENVIRONMENT
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The
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.Ev SU_DEBUG_OUTPUT
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variable can be set to a file to send debugging
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output to that file.
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.Pp
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The
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.Ev SU_DEBUG_LEVEL
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variable can be set to a non-zero integer to increase
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the level of debugging. Currently this is a on or off thing; it should
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perhaps use the ioctl to set the debug level in the kernel and then set
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it back to zero at program exit.
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.Pp
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The
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.Ev SU_DEBUG_TRUNCATE
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variable can be set to an integer to limit the
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amount of data phase output sent to the debugging file.
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.Pp
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The
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.Ev EDITOR
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variable determines the editor to use for the mode editor.
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.Sh SEE ALSO
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.Xr scsi 3 ,
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.Xr scsi 4 ,
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.Xr ssc 4
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.Sh BUGS
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.Pp
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Some devices respond to an inquiry for all LUNS. This will cause them
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to come on line to 8 times during reprobe to different logical units.
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.Pp
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The
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.Fl i
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option to do an inquiry went away in
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.Fx 2.1 .
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The new facilities
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provided by
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.Fl c
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supercede that.
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.Pp
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Check your permissions carefully.
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.Ql scsi -f /dev/rsd0c -c "4 0 0 0 0 0
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permits anyone who can open
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.Pa /dev/rsd0c
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to format the disk drive. This must be changed to
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at least require write access to the drive.
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.Sh HISTORY
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The
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.Nm scsi
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command appeared in 386BSD 0.1.2.4 to support the new reprobe
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and user SCSI commands. It first appeared in
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.Tn FreeBSD
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in
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.Fx 2.0.5 .
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