| ch.4 (50476) | ch.4 (57676) |
|---|---|
| 1.\" $FreeBSD: head/share/man/man4/ch.4 50476 1999-08-28 00:22:10Z peter $ | 1.\" $FreeBSD: head/share/man/man4/ch.4 57676 2000-03-01 14:50:24Z sheldonh $ |
| 2.\" Copyright (c) 1996 3.\" Julian Elischer <julian@freebsd.org>. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. --- 23 unchanged lines hidden (view full) --- 33.Sh SYNOPSIS 34.Cd device ch 35.Cd device ch1 target 4 unit 0 36.Sh DESCRIPTION 37The 38.Xr ch 39driver provides support for a 40.Em SCSI | 2.\" Copyright (c) 1996 3.\" Julian Elischer <julian@freebsd.org>. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. --- 23 unchanged lines hidden (view full) --- 33.Sh SYNOPSIS 34.Cd device ch 35.Cd device ch1 target 4 unit 0 36.Sh DESCRIPTION 37The 38.Xr ch 39driver provides support for a 40.Em SCSI |
| 41media changer. It allows many slots of media to be multiplexed between | 41media changer. 42It allows many slots of media to be multiplexed between |
| 42a number of drives. The changer device may optionally be equipped 43with a bar code reader, which reads label informationen attached to 44the media. 45.Pp 46A SCSI adapter must also be separately configured into the system 47before a SCSI changer can be configured. 48.Pp 49As the SCSI adapter is probed during boot, the 50.Em SCSI | 43a number of drives. The changer device may optionally be equipped 44with a bar code reader, which reads label informationen attached to 45the media. 46.Pp 47A SCSI adapter must also be separately configured into the system 48before a SCSI changer can be configured. 49.Pp 50As the SCSI adapter is probed during boot, the 51.Em SCSI |
| 51bus is scanned for devices. Any devices found which answer as 'Changer' | 52bus is scanned for devices. 53Any devices found which answer as 'Changer' |
| 52type devices will be 'attached' to the 53.Nm 54driver. 55In FreeBSD releases prior to 2.1, the first found will be attached as 56.Em ch0 57and the next, 58.Em ch1 59etc. --- 26 unchanged lines hidden (view full) --- 86.It Dv CHET_IE 87Import/export element (portal). 88.It Dv CHET_DT 89Data transfer element (drive). 90.El 91.Pp 92The following 93.Xr ioctl 2 | 54type devices will be 'attached' to the 55.Nm 56driver. 57In FreeBSD releases prior to 2.1, the first found will be attached as 58.Em ch0 59and the next, 60.Em ch1 61etc. --- 26 unchanged lines hidden (view full) --- 88.It Dv CHET_IE 89Import/export element (portal). 90.It Dv CHET_DT 91Data transfer element (drive). 92.El 93.Pp 94The following 95.Xr ioctl 2 |
| 94calls apply to the changer. They are defined | 96calls apply to the changer. 97They are defined |
| 95in the header file 96.Aq Pa sys/chio.h . 97.Pp 98.Bl -tag -width CHIOEXCHANGE 99.It Dv CHIOMOVE 100.Pq Li "struct changer_move" 101Move a medium from one element to another (\fBMOVE MEDIUM\fR) using 102the current picker. The source and destination elements are specified --- 201 unchanged lines hidden --- | 98in the header file 99.Aq Pa sys/chio.h . 100.Pp 101.Bl -tag -width CHIOEXCHANGE 102.It Dv CHIOMOVE 103.Pq Li "struct changer_move" 104Move a medium from one element to another (\fBMOVE MEDIUM\fR) using 105the current picker. The source and destination elements are specified --- 201 unchanged lines hidden --- |