i386/77154: 5.3 refuses to boot when IDE channel2 is enabled and no drive is installed

[JD Bronson]

>Number:         77154
>Category:       i386
>Synopsis:       5.3 refuses to boot when IDE channel2 is enabled and no drive is installed
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Feb 06 00:40:15 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     JD Bronson
>Release:        5.3
>Organization:
Aurora Health Care
>Environment:
FreeBSD 5.3-STABLE FreeBSD 5.3-STABLE #0: Sat Feb  5 08:58:19 CST 2005     jbronson at shadow.wixb.com:/usr/obj/usr/src/sys/WIXB  i386
>Description:
Using 5.3 release is when I 1st noticed this. CVSup to 5.3-STABLE does not fix this trouble.

If both IDE channels are enabled and they are all set to AUTO/AUTO for master/slave and there is no drive (yet) installed to IDE channel2, the machine hangs at boot. If I install a drive to IDE channel2, the machine boots.

If I disable IDE channel2, the machine will boot as well.

When it hangs, all I see on the console is:

FreeBSD/i386 BOOT
Default: 0:ad(0,a)/boot/loader
boot:

..if I hit <return> at this point, the beastie menu comes up.
The machine will NOT boot on it's own.
>How-To-Repeat:
See Description
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: