248 lines
8.2 KiB
Groff
248 lines
8.2 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 1.4 1995/05/01 12:35:04 dufault 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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.Bd -literal -offset
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Usage:
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scsi -f device -d debug_level # To set debug level
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scsi -f device [-v] -z seconds # To freeze bus
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scsi -f device -m page [-P pc] [-e] # To read mode pages
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scsi -f device -p [-b bus] [-l lun] # To probe all devices
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scsi -f device -r [-b bus] [-t targ] [-l lun] # To reprobe a device
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scsi -f device [-v] [-s seconds] -c cmd_fmt [arg0 ... argn] # A command...
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-o count out_fmt [arg0 ... argn] # EITHER (for data out)
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-i count in_fmt # OR (for data in)
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.Pp
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"out_fmt" can be "-" to read output data from stdin;
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"in_fmt" can be "-" to write input data to stdout;
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.Pp
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If debugging is not compiled in the kernel, "-d" will have no effect
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.Ed
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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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.Fr -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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.Em SCSIDEBUG
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option. See
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.Fr /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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.Fr -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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.Fr -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 SCSI_FREEZE 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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.Fr -m
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option is used to read a device mode page. The file
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.Fr /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 SCSI_MODES can specify a different file to use.
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.Pp
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.in +.25i
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The
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.Fr -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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.Bd -literal -offset
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0 Current Values
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1 Changeable Values
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2 Default Values
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3 Saved Values
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.Ed
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.Pp
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The
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.Fr -e
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option permits you to edit the fields. It will use the editor specified
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by your EDITOR environment variable. To store changes permanently,
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edit page control 3 using the
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.Fr -P
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flag.
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.in -.25i
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.Pp
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The
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.Fr -p
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option can be used against the "super scsi" device
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.Fr /dev/scsi/super
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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 -b option and the default is 0.
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The lun can be selected with the -l option and the default is 0.
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See
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.Xr scsi 4
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for a description of the "super scsi" device.
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.Pp
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The
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.Fr -r
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option can be used in FreeBSD 1.1 to reprobe a specific SCSI device at a given
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Bus, Target and Lun.
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This is not needed in FreeBSD 2.1, since opening a fixed SCSI device
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has the side effect of reprobing it, and probing with the bus with the
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-p option should bring on line any newly found devices.
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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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.Fr -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 SCIOCCOMMAND 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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.in +.25i
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.Pp
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.Fr -v
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turns on more verbose information.
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.Pp
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.Fr -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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.Fr "-c 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.
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.Pp
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.Fr "-o count out_fmt 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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.Fr out_fmt
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can be specified as a hyphen ("-") to indicate that the
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.Fr count
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bytes of data should be read from the standard input.
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.Pp
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.Fr "-i count 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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.Fr count
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bytes of data read in. The information is extracted according to
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.Fr 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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.Fr in_fmt
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can be specified as a hyphen ("-") to indicate that the
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.Fr count
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bytes of data input should be written to the standard output.
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.in -.25i
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.Sh EXAMPLES
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To verify that the device type for the disk /dev/rsd0c is 0
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(direct access device):
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.Bd -literal -offset
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root# scsi -f /dev/rsd0c -c "12 0 0 0 64 0" -i 64 "*b3 b5"
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0
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.Ed
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.Pp
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To do an inquiry to /dev/rsd2c:
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.Bd -literal -offset
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root# scsi -f /dev/rsd2c -c "12 0 0 0 64 0" -i 64 "s8 z8 z16 z4"
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FUJITSU M2654S-512 010P
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.Pp
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To edit mode page 1 on /dev/rsd2c, and store it permanently on the
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drive:
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.Bd -literal -offset
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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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.Sh ENVIRONMENT
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The SU_DEBUG_OUTPUT 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 SU_DEBUG_LEVEL 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 SU_DEBUG_TRUNCATE 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 EDITOR variable determines the editor to use for the mode editor.
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.Sh SEE ALSO
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.Xr scsi 4 ,
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.Xr scsi 3
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.Sh BUGS
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.Pp
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This command wasn't ready for inclusion in 2.0R and so is missing in
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that release.
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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 "-i" option to do an inquiry went away in 2.1. The new facilities
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provided by "-c" supercede that.
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.Pp
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Check your permissions carefully.
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"scsi -f /dev/rsd0c -c "4 0 0 0 0 0" permits anyone who can open
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/dev/rsd0c 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/FreeBSD to support the new reprobe
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and user SCSI commands.
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