SCSI media-changer (juke box)
ch? at scsibus?
ch driver provides support for SCSI
juke boxes. It allows many slots of media to be multiplexed between a number
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.
- device entries
chio(1), cd(4), intro(4), scsi(4), sd(4), st(4)
ch driver appeared in 386BSD 0.1.