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Date: Sat, 02 Jun 2001 10:22:52 +0100
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Subject: kern/27834: Cannot warm-reboot Compaq AP400 due to SCSI problems
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>Number:         27834
>Category:       kern
>Synopsis:       Cannot warm-reboot Compaq AP400 due to SCSI problems
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jun 02 02:30:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Pete French
>Release:        FreeBSD 4.3-STABLE i386
>Organization:
twisted.org.uk
>Environment:
System: FreeBSD skerry 4.3-STABLE FreeBSD 4.3-STABLE #1: Fri May 25 23:13:54 BST 2001 root@skerry.mildmay.local:/usr/src/sys/compile/SKERRY i386


	Compaq AP400 Workstation. Onboard SCSI controller (sym0) with two
	external drives. SMART-2LS RAID controller running two internal
	drives as RAID0 for booting off. Latest BIOS updates on both the
	motherboard and the RAID controllers. Single processor, 128meg of RAM.

>Description:

	After running FreeBSD on the machine you must power off the machine
	before attempting to reboot. trying to warm reboot the machine
	causes it to hang at the point in the BIOS where it would normally
	scan the onboard SCSI controller for external discs. It appears
	something about FreeBSD puts this controller into a state where it
	will not restart properly. Note that this also happens if you compile
	a FreeBSD kernel without the sym or ncr drivers in it, so the problem
	does not appear to be related to these drivers per-se.

>How-To-Repeat:

	Boot FreeBSD 4.2 or greater onto a Compaq AP400 workstation. Type
	'reboot' and the system will attempt to reboot, hanging at the point
	where the onboard SCSI bios scans for external drives.
	
>Fix:

	Always power off the machine before rebooting. The downside of
	this is that the machine cannot be rebooted remotely.
>Release-Note:
>Audit-Trail:
>Unformatted:

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