*BSD News Article 73231


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From: mjtlx@ozemail.com.au (Murray Taylor)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: SCSI LUN's w.r.t. CD juke box
Date: Tue, 09 Jul 1996 13:58:35 GMT
Organization: OzEmail Pty Ltd - Australia
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Given that:
[ 1 ] I have just obtained the Walnut Creek FreeBSD 2.1 cdrom
[ 2 ] Reading the hardware.txt file indicates that my Adaptec  AHA
-2842A SCSI card should have a kernel driver [ ahc1 ] included to
control it.
[ 3 ] My CD ROM device is a Pioneer DRM 624X 6 disk, quad speed
jukebox

The question is....

Does the driver know about the SCSI  logical unit numbers ( LUN's )
that are used to control the individual disks in the jukebox?? 

The SCSI address of the jukebox is device #3 and the disks are
accessed as follows:

	disk 1 ---- device #3, LUN #0
	disk 2 ---- device #3, LUN #1
	disk 3 ---- device #3, LUN #2

	etc., etc., ....

Being an ex-CROMIX pilot, I am hoping that some easy form of
[ major_number : minor_number ] addressing is possible.

Note: I have not yet installed FreeBSD as I am still reading doco ...
(WHAT someone who reads that stuff!!!) and also have some projects in
progress under that single user program launcher that most of the
worlds PC's appear to be infested with.

cheers
/mjt