1.\" $NetBSD: chio.1,v 1.4 1997/10/02 00:41:25 hubertf Exp $ 2.\" 3.\" Copyright (c) 1996 Jason R. Thorpe <thorpej@and.com> 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgements: 16.\" This product includes software developed by Jason R. Thorpe 17.\" for And Communications, http://www.and.com/ 18.\" 4. The name of the author may not be used to endorse or promote products 19.\" derived from this software without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" $FreeBSD$ 34.\" 35.Dd May 14, 1998 36.Dt CHIO 1 37.Os 38.Sh NAME 39.Nm chio 40.Nd medium changer control utility 41.Sh SYNOPSIS 42.Nm 43.Op Fl f Ar changer 44.Ar command 45.Op Fl <flags> 46.Ar arg1 47.Ar arg2 48.Op Ar arg3 Op ... 49.Sh DESCRIPTION 50.Nm 51is used to control the operation of medium changers, such as those found 52in tape and optical disk jukeboxes. 53.Pp 54The options are as follows: 55.Bl -tag -width indent 56.It Fl f Ar changer 57Use the device 58.Ar changer 59rather than the default device 60.Pa /dev/ch0 . 61.El 62.Pp 63The default changer may be overridden by setting the environment variable 64.Ev CHANGER 65to the desired changer device. 66.Pp 67A medium changer apparatus is made up of 68.Em elements . 69There are five element types: 70.Em picker 71(medium transport), 72.Em slot 73(storage), 74.Em portal 75(import/export), 76.Em drive 77(data transfer), and 78.Em voltag 79(select by volume identifier). The 80.Em voltag 81pseudo-element type allows the selection of tapes by their volume tag 82(typically a barcode on the tape). 83.Pp 84In this command description, the shorthand 85.Em ET 86will be used to represent an element type, and 87.Em EU 88will be used to represent an element unit. 89For example, to represent the first robotic arm in the changer, the 90.Em ET 91would be 92.Dq picker 93and the 94.Em EU 95would be 96.Dq 0 . 97.Pp 98.Sh SUPPORTED COMMANDS 99.Bl -tag -width indent 100.It Ic move Xo 101.Ar <from ET> <from EU> <to ET> <to EU> 102.Op Cm inv 103.Xc 104Move the media unit from 105.Ar <from ET/EU> 106to 107.Ar <to ET/EU> . 108If the optional modifier 109.Cm inv 110is specified, the media unit will be inverted before insertion. 111.It Ic exchange Xo 112.Ar <src ET> <src EU> <dst1 ET> <dst1 EU> 113.Op Ar <dst2 ET> <dst2 ET> 114.Op Cm inv1 115.Op Cm inv2 116.Xc 117Perform a media unit exchange operation. The media unit in 118.Ar <src ET/EU> 119is moved to 120.Ar <dst1 ET/EU> 121and the media unit previously in 122.Ar <dst1 ET/EU> 123is moved to 124.Ar <dst2 ET/EU> . 125In the case of a simple exchange, 126.Ar <dst2 ET/EU> 127is omitted and the values 128.Ar <src ET/EU> 129are used in their place. 130The optional modifiers 131.Cm inv1 132and 133.Cm inv2 134specify whether the media units are to be inverted before insertion into 135.Ar <dst1 ET/EU> 136and 137.Ar <dst2 ET/EU> 138respectively. 139.Pp 140Note that not all medium changers support the 141.Ic exchange 142operation; the changer must have multiple free pickers or emulate 143multiple free pickers with transient storage. 144.It Ic return Xo 145.Ar <from ET> <from EU> 146.Xc 147Return the media unit to its source element. 148This command will query the status of the specified media unit, and 149will move it to the element specified in its source attribute. 150This is a convenient way to return media from a drive or portal 151to its previous element in the changer. 152.Pp 153.It Ic position Xo 154.Ar <to ET> <to EU> 155.Op Cm inv 156.Xc 157Position the picker in front of the element described by 158.Ar <to ET/EU> . 159If the optional modifier 160.Cm inv 161is specified, the media unit will be inverted before insertion. 162.Pp 163Note that not all changers behave as expected when issued this command. 164.It Ic params 165Report the number of slots, drives, pickers, and portals in the changer, 166and which picker unit the changer is currently configured to use. 167.It Ic getpicker 168Report which picker unit the changer is currently configured to use. 169.It Ic setpicker Xo 170.Ar <unit> 171.Xc 172Configure the changer to use picker 173.Ar <unit> . 174.Pp 175.It Ic ielem Xo 176.Op Ar <timeout> 177.Xc 178Perform an 179.Em INITIALIZE ELEMENT STATUS 180operation on the changer. The optional 181.Ar <timeout> 182parameter may be given to specify a timeout in seconds for the 183operations. This may be used if the operation takes unusually long 184because of buggy firmware or the like. 185.It Ic voltag Xo 186.Op Fl fca 187.Ar <ET> 188.Ar <EU> 189.Op Ar <label> 190.Op Ar <serial> 191.Xc 192Change volume tag for an element in the media changer. This command 193is only supported by few media changers. If it is not supported by a 194device, using this command will usually result in a "Invalid Field in 195CDB" error message on the console. 196.Pp 197If the 198.Fl c 199flag is specified, the volume tag of the specified element is 200cleared. If the 201.Fl f 202flag is specified, the volume tag is superseded with the specified 203volume tag even if a volume tag is already defined for the element. 204It is an error to not specify the 205.Fl f 206flag when trying to set a label for an element which already has 207volume tag information defined. 208.Pp 209The command works with the primary volume tag or, if the 210.Fl a 211flag is given, with the alternate volume tag. 212.It Ic status Xo 213.Op Fl vVsSbIa 214.Op Ar <type> 215.Xc 216Report the status of all elements in the changer. If 217.Ar <type> 218is specified, report the status of all elements of type 219.Ar <type> . 220.It Fl v 221Print the primary volume tag for each loaded medium, if any. The volume 222tag is printed as 223.Dq <LABEL:SERIAL> . 224.It Fl V 225Print the alternate volume tag for each loaded medium, if any. 226.It Fl s 227Print the additional sense code and additional sense code qualifier for 228each element. 229.It Fl S 230Print the element source address for each element. 231.It Fl b 232Print SCSI bus information for each element. Note that this information 233is valid only for drives. 234.It Fl I 235Print the internal element addresses for each element. The internal 236element address is not normally used with this driver. It is reported 237for diagnostic purposes only. 238.It Fl a 239Print all additional information (as in 240.Fl vVsSba 241). 242.El 243.Pp 244The status bits are defined as follows: 245.Bl -tag -width indent 246.It FULL 247Element contains a media unit. 248.It IMPEXP 249Media was deposited into element by an outside human operator. 250.It EXCEPT 251Element is in an abnormal state. 252.It ACCESS 253Media in this element is accessible by a picker. 254.It EXENAB 255Element supports passing media (exporting) to an outside human operator. 256.It INENAB 257Element supports receiving media (importing) from an outside human operator. 258.El 259.Pp 260.Sh EXAMPLES 261.Bl -tag -width indent 262.It Li chio move slot 3 drive 0 263Move the media in slot 3 (fourth slot) to drive 0 (first drive). 264.It Li chio move voltag VOLUME01 drive 0 265Move the media with the barcode VOLUME01 to drive 0 (first drive). 266.It Li chio return drive 0 267Remove the tape from drive 0 (first drive) and return it to its original 268location in the rack. 269.It Li chio setpicker 2 270Configure the changer to use picker 2 (third picker) for operations. 271.El 272.Sh FILES 273.Bl -tag -width /dev/ch0 -compact 274.It Pa /dev/ch0 275default changer device 276.El 277.Sh SEE ALSO 278.Xr mt 1 , 279.Xr mount 8 280.Sh AUTHORS 281.An -nosplit 282The 283.Nm 284program and SCSI changer driver were written by 285.An Jason R. Thorpe Aq thorpej@and.com 286for And Communications, 287.Pa http://www.and.com/ . 288.Pp 289Additional work by 290.An Hans Huebner 291.Aq hans@artcom.de 292and 293.An Steve Gunn 294.Aq csg@waterspout.com . 295