This is a driver for SCSI media changers. Most common devices are
tape libraries and MOD/CDROM jukeboxes. *Real* jukeboxes, you
don't need this for those tiny 6-slot cdrom changers. Media
changers are listed as "Type: Medium Changer" in /proc/scsi/scsi.
If you have such hardware and want to use it with linux, say Y
here. Check <file:Documentation/scsi/scsi-changer.rst> for details.

If you want to compile this as a module ( = code which can be
inserted in and removed from the running kernel whenever you want),
say M here and read <file:Documentation/kbuild/modules.rst> and
<file:Documentation/scsi/scsi.rst>. The module will be called ch.o.
If unsure, say N.

source code:

drivers/scsi/ch.c