01-29-2009
Check with the changer device manufacturer, OEM, or VAR (value-added-resaler) to see if they have some device drivers and/or tools. If not, you can try the plain ordinary mt command to see if that gives you what you need.
This Bacula code has a script to simplify the operation, and it's all based on mt.
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CH(4) BSD 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
BSD
June 10, 1998 BSD