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Date: Tue, 02 Jan 96 22:20:23 -0800
From: Bill Taylor <eod@waun.tdsnet.com>
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To: bugs@freebsd.org, support@cdrom.com
Subject: two faced ide controllers loose out to generic kernel after build
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It seems if you are building on a dual interface ide controller that you 
had better have your disk partitions on side 1(wc0). The generic kernel 
you get when you come back up on disk(hard), does not locate wc1 at irq 15 
... I had my first system that had a master/slave two disk setup yeild
2.1 Gig but tie up the entire first side. Building from the cdrom and 
other disk on wc1 was no problem, but was unavailable once the kernel was
booted off it.

The next computer with the same two interface ide controller, worked fine 
since the cdrom was on the second side but the dos partition disk and the 
other disk(one for FreeBSD) were both on side wc0. Once I booted, the 
cdrom and entire second  part of the controller were invisible.

I went into the kernel config sources and remade the existing generic
kernel with a local name for later changes and presto/chango both side
were indeed findable.

My conclusion is that the generic disk kernel on the new 2.1 walnut creek 
cdrom is bad(or just a little short of generic enough).

Hope this tidbit helps others. If someone would like to pump me further,
I work at the University of Wisconsin, Madison and can be reached
either by phone at 608-262-8659, or email at bt@ssec.wisc.edu