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Date:      Thu, 22 Feb 2001 03:54:41 
From:      "Aaron Hill" <hillaa@hotmail.com>
To:        ralph@maxsoft.com, matt@gsicomp.on.ca
Cc:        freebsd-questions@FreeBSD.ORG, izotov@gol.ru, tait@wego.com, ivanfetch@technologist.com, timcm@umich.edu
Subject:   Re: ata1-master: <MATSHITA cr-581/1c05> CDROM device - NO DRIVER!
Message-ID:  <F157SsfqS78KgCjHR7c00007c19@hotmail.com>

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>Here's the output from dmesg, which now also contains several strange
>"config" lines which I don't understand and which might possibly be 
>relevant:

<snip>
>config> di sn0
>config> di lnc0
>config> di ie0
>config> di fe0
>config> di cs0
>config> di bt0
>No such device: bt0
>Invalid command or syntax.  Type `?' for help.
>config> di aic0
>No such device: aic0
>Invalid command or syntax.  Type `?' for help.
>config> di aha0
>No such device: aha0
>Invalid command or syntax.  Type `?' for help.
>config> di adv0
>No such device: adv0
>Invalid command or syntax.  Type `?' for help.
>config> q


What those config lines are is the output of a script being run at boot 
time. The letters di means disable and the other letters are the drivers for 
some network and scsi cards.

I can tell you that but I cannot remember where these commands come from, I 
know they are in one of the files in the /boot directory. If you'd like to 
find out which file it is log into the system and type these commands...

cd /boot
grep sn0 *

... and note the name of the file that gets returned.

The use of these lines, as I understand it, is to disable some hardware 
before the kernel initialises everything. You might do this if you had 
hardware conflicts or if you purposely wanted to stop some hardware from 
being used in FreeBSD.

Obviously the commands that produce the errors "No such device" are not 
needed on your system as it does not contain the hardware you are trying to 
disable.


I hope that helps you understand that little bit of the boot up process. As 
for your CD I cannot help much. I can say that those devices you see being 
disabled (without generating an error) are all network cards so this 
shouldn't affect the operation of your CD-ROM drive.


Good luck

Aaron Hill





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