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From: Duncan Barclay <Duncan.Barclay@pa-consulting.com>
To: freebsd-hackers <freebsd-hackers@freebsd.org>
Subject: IDE CDROM on 2.1.5R
Date: Wed, 18 Dec 96 08:53:00 PST
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Hi

Another snippet of trivia if anyone is interested. I have
2.1.5R and a Sony CDU-77 IDE CDROM drive which does
sort of work and IDE disks (this is my home machine).

I wanted to mount a CDROM but /etc/wekly had started up and
was doing a mkwhatis. Doing the mount generated the usual
/dev/wcd0c: device not configured.
Usually a reboot clears this so I waited until the mkwhatis finished.
Just before rebooting I tried remounting the CDROM and it worked!
So I played with that for a while and then wanted to use another CDROM.
The first time I tried the mount it failed as above, so I thought lets just
do
an ls and see what happens...it worked. I then tried to repeat this a 
sequence
a few times and it seems to work reliably.

ie.

$ mount /cdrom
/dev/wcd0c: device not configured
$ ls /
$ mount /cdrom
$ ls /cdrom
....

I know that 2.2 ATAPI support should fix all these but for those of us 
still on 2.1.5R
then this may be useful.

Duncan Barclay