$NetBSD: ch.4,v 1.3 2001/09/12 18:19:16 wiz Exp $
.Dd June 10, 1998 .Dt CH 4 .Os .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 l -tag -width /dev/rsdXXXXX -compact t Pa /dev/ch Ns Ar u .Tn SCSI bus media changer unit .Ar u .El
.Dd June 10, 1998 .Dt CH 4 .Os .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 l -tag -width /dev/rsdXXXXX -compact t Pa /dev/ch Ns Ar u .Tn SCSI bus media changer unit .Ar u .El
a /usr/include/sys/chio.h .Sh DIAGNOSTICS l -diag t "ch%d: waiting %d seconds for changer to settle..." Some changers require a long time to settle out, to do tape inventory, for instance. t "ch%d: offline" The changer is not responding. t "ch%d: warning, READ ELEMENT STATUS avail != count" t "ch%d: could not sense element address page" t "ch%d: could not sense capabilities page" .El .Sh SEE ALSO .Xr chio 1 , .Xr ioctl 2 , .Xr cd 4 , .Xr intro 4 , .Xr scsi 4 , .Xr st 4 .Sh AUTHORS .An Jason R. Thorpe
Indexes created Sat Sep 20 22:09:52 GMT 2025