a76d855399
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.
51 lines
1.1 KiB
Groff
51 lines
1.1 KiB
Groff
.\" $NetBSD: ch.4,v 1.1 1998/06/10 11:15:21 fair Exp $
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.\"
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.Dd June 10, 1998
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.Dt CH 4
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.Os NetBSD
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.Sh NAME
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.Nm ch
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.Nd SCSI media changer driver
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.Sh SYNOPSIS
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.Cd "ch* at scsibus? target ? lun ?"
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.Sh DESCRIPTION
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The
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.Nm
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driver is essentially an
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.Xr ioctl 2
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interface to a robot on a
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.Tn SCSI
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bus - a device that will change media (e.g. tapes, CD-ROMs, etc)
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in and out of drives for that media.
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The
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.Xr chio 1
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utility program uses this interface to manipulate such robots.
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.Sh FILES
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.Bl -tag -width /dev/rsdXXXXX -compact
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.It Pa /dev/ch Ns Ar u
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.Tn SCSI
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bus media changer unit
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.Ar u
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.El
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.Pa /usr/include/sys/chio.h
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "ch%d: waiting %d seconds for changer to settle..."
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Some changers require a long time to settle out,
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to do tape inventory, for instance.
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.It "ch%d: offline"
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The changer is not responding.
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.It "ch%d: warning, READ ELEMENT STATUS avail != count"
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.It "ch%d: could not sense element address page"
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.It "ch%d: could not sense capabilities page"
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.El
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.Sh SEE ALSO
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.Xr chio 1 ,
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.Xr ioctl 2 ,
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.Xr intro 4 ,
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.Xr scsi 4 ,
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.Xr cd 4 ,
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.Xr st 4
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.Sh AUTHORS
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Jason R. Thorpe
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