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From: Julian Elischer <julian@ref.tfs.com>
Message-Id: <199511221935.LAA09547@ref.tfs.com>
Subject: Re: Getting an optical drive to work
To: charlie_conklin@il.us.swissbank.com (Charlie Conklin)
Date: Wed, 22 Nov 1995 11:35:53 -0800 (PST)
Cc: questions@FreeBSD.ORG
In-Reply-To: <9511220928.AA02124@ln1d370nwk> from "Charlie Conklin" at Nov 22, 95 09:27:56 am
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it's recognised and assigned to the 'unknown' driver

it is therefore accessible through the uk0 device
unfortunatly uk devices only know how to do generic scsi operations
(see man 4 scsi, man 4 uk)
(also man 8 scsi)

is this divice treatable as a hard disk?
oris it write -once only?

if it can be made to read and write, then you can FORCE it
to be assigned to the sd (scsi disk) driver by adding 
a line to the file /sys/scsi/scsiconf.c (in two places, as there are two
different configure options #ifdef'd there)
that specifies the exact configuration options to look for, and then
specifies that such a device should be assigned using sdattach

there are quite a few examples there..

you then compile a new kernel (there's an FAQ on that in /usr/share/FAQ)
and see if it works..


> 
> Hi,
> 
> I have FreeBSD on a Gateway machine, and am trying to get a SCSI
>  optical drive to work. At boot time, the device is found and
>  recognised, but it does not seem to assign it to any any of the
>  special files in /dev. Does anybody have any hints as to how to
>  get this to work?
> 
> The pertinent part of the boot messages follows:
> 
>   ahc0 <Adaptec 294X SCSI host adapter> rev 0 int a irq 9 on pci0:6
>   ahc0: reading board settings
>   ahc0: 294x Single Channel, SCSI Id=7, aic7870, 16 SCBs
>   ahc0: Downloading Sequencer Program...Done
>   ahc0: Probing channel A
>   ahc0 waiting for scsi devices to settle
>   ahc0: target 0 synchronous at 10.0MB/s, offset = 0x8
>   (ahc0:0:0): "COMPAQ C2490A 3184" type 0 fixed SCSI 2
>   sd0(ahc0:0:0): Direct-Access 2006MB (4110000 512 byte sectors)
>   ahc0: target 2 synchronous at 4.4MB/s, offset = 0x8
>   (ahc0:2:0): "FUJITSU M2266S-1024 0014" type 0 fixed SCSI 1
>   sd1(ahc0:2:0): Direct-Access 1087MB (1113504 1024 byte sectors)
>   ahc0: target 6 synchronous at 5.0MB/s, offset = 0x8
>   (ahc0:6:0): "FUJITSU M2512A 1314" type 7 removable SCSI 2
>   uk0(ahc0:6:0): Unknown
> 
> The optical is the Fuji M2512A found, and is a 230MB capacity
> removable optical.
> 
> Thanks for any help.
> 
> - Charlie Conklin	conklic@swissbank.com
>