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Date: Sat, 28 Dec 1996 13:00:22 +0100 (MET)
From: Wolfgang Helbig <wh@helbig.informatik.ba-stuttgart.de>
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To: FreeBSD-gnats-submit@freebsd.org
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Subject: kern/2305: system hangs with second Ide controller
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>Number:         2305
>Category:       kern
>Synopsis:       system hangs with second Ide controller
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Dec 28 04:10:01 PST 1996
>Last-Modified:
>Originator:     Wolfgang Helbig
>Organization:
>Release:        FreeBSD 3.0-CURRENT i386
>Environment:

	Processor:	i486DX2
 	Motherboard: 	UM8810P AIO
	Chipsets:    	UMC UM8881 (Host Bridge)
			UMC UM8886 (ISA Brigde Controller)
			CMD PCIO640B (PCI Bus IDE Controller)
 	BIOS:		Phoenix - BIOS
	Disks:		Conner Peripherals 850 MB CFS850A
			Seagate 1275 MB ST31276A		
	CD-ROM:		Mitsumi ATAPI FX400
	Software:	Generic Kernel FreeBSD 2.1.5
		        Generic Kernel FreeBSD 2.2 Alpha
		        Kernel FreeBSD - current (22. Dec )
>Description:

        Whenever wdc1 and wdc0 are used concurrently (copying one 
        file from a disk connected to wdc1 to a disk connected to
        wdc0) the system hangs after about 2 seconds.	

>How-To-Repeat:

 	Attach one disk as master to wdc0 the other as master to
        wdc1 and copy a big file from one disk to the other.	
	OR:
	Attach one disk as master to wdc2, the other as master to
	wdc0 and the CD-ROM as slave to wdc0. Try to install
	from CD-ROM to the disk on wdc2. (FreeBSD 2.1.5-boot.flp)
	Everything works fine till the binaries are installed. The
	system hangs.

>Fix:
  	Attach both disks to wdc0 and forget the CD-ROM.
>Audit-Trail:
>Unformatted: