CH(4)                   NetBSD 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 NetBSD 8.1 June 10, 1998 NetBSD 8.1

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