NetBSD/share/man/man4/ch.4
fair a76d855399 Attempt to finish off PR#2008, and document our SCSI subsystem.
Add references to ATAPI support; do a quick job from UTSL on scanners,
and the changer thing. Also document that SCSI bus Ethernet interface
that appears to be supported. Clean up some nroff stuff in the exiting
pages.
1998-06-10 11:15:20 +00:00

51 lines
1.1 KiB
Groff

.\" $NetBSD: ch.4,v 1.1 1998/06/10 11:15:21 fair Exp $
.\"
.Dd June 10, 1998
.Dt CH 4
.Os NetBSD
.Sh NAME
.Nm ch
.Nd SCSI media changer driver
.Sh SYNOPSIS
.Cd "ch* at scsibus? target ? lun ?"
.Sh DESCRIPTION
The
.Nm
driver is essentially an
.Xr ioctl 2
interface to a robot on a
.Tn SCSI
bus - a device that will change media (e.g. tapes, CD-ROMs, etc)
in and out of drives for that media.
The
.Xr chio 1
utility program uses this interface to manipulate such robots.
.Sh FILES
.Bl -tag -width /dev/rsdXXXXX -compact
.It Pa /dev/ch Ns Ar u
.Tn SCSI
bus media changer unit
.Ar u
.El
.Pa /usr/include/sys/chio.h
.Sh DIAGNOSTICS
.Bl -diag
.It "ch%d: waiting %d seconds for changer to settle..."
Some changers require a long time to settle out,
to do tape inventory, for instance.
.It "ch%d: offline"
The changer is not responding.
.It "ch%d: warning, READ ELEMENT STATUS avail != count"
.It "ch%d: could not sense element address page"
.It "ch%d: could not sense capabilities page"
.El
.Sh SEE ALSO
.Xr chio 1 ,
.Xr ioctl 2 ,
.Xr intro 4 ,
.Xr scsi 4 ,
.Xr cd 4 ,
.Xr st 4
.Sh AUTHORS
Jason R. Thorpe