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Command: ch | Section: 4 | Source: NetBSD | File: ch.4
CH(4) FreeBSD Kernel Interfaces Manual CH(4)
NAME
ch - SCSI media changer driver
SYNOPSIS
ch* at scsibus? target ? lun ?
DESCRIPTION
The ch driver is essentially an ioctl(2) interface to a robot on a SCSI
bus - a device that will change media (e.g. tapes, CD-ROMs, etc) in and
out of drives for that media. The chio(1) utility program uses this
interface to manipulate such robots.
FILES
/dev/chu SCSI bus media changer unit u
/usr/include/sys/chio.h
DIAGNOSTICS
ch%d: waiting %d seconds for changer to settle... Some changers require
a long time to settle out, to do tape inventory, for instance.
ch%d: offline The changer is not responding.
ch%d: warning, READ ELEMENT STATUS avail != count
ch%d: could not sense element address page
ch%d: could not sense capabilities page
SEE ALSO
chio(1), ioctl(2), cd(4), intro(4), scsi(4), st(4)
AUTHORS
Jason R. Thorpe
FreeBSD 14.1-RELEASE-p8 June 10, 1998 FreeBSD 14.1-RELEASE-p8