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CH(4)		       FreeBSD Kernel Interfaces Manual			 CH(4)

NAME
     ch	-- SCSI	media-changer (juke box) driver

SYNOPSIS
     ch? at scsibus?

DESCRIPTION
     The ch driver provides support for	SCSI juke boxes.  It allows many slots
     of	media to be multiplexed	between	a number of drives.

     A SCSI adapter and	a logical scsibus must also be separately configured
     into the system before a SCSI changer can be configured.

     As	the SCSI adapter is probed during boot,	the SCSI bus is	scanned	for
     devices.  Any devices found which answer as "Changer" type	devices	will
     be	"attached" to the ch driver.  The first	device found will be attached
     as	ch0 and	the next ch1, etc.  It is also possible	to specify what	ch
     unit a device should come on-line as; refer to scsi(4) for	details	on
     kernel configuration.

FILES
     /dev/ch[0-9]  device entries

SEE ALSO
     chio(1), cd(4), intro(4), scsi(4),	sd(4), st(4)

HISTORY
     The ch driver appeared in 386BSD 0.1.

FreeBSD	13.0			October	6, 2011			  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | HISTORY

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