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/ch
u-
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