From owner-freebsd-bugs  Tue Mar 30 11:40:19 1999
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Date: Tue, 30 Mar 1999 22:39:40 +0300
From: Vladimir Litovka <doka@doka.kiev.sovam.com>
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Subject: kern/10876: aic7895 code failed
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>Number:         10876
>Category:       kern
>Synopsis:       aic7895 code failed
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Mar 30 11:40:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Vladimir Litovka
>Release:        FreeBSD 3.1-19990328-STABLE i386
>Organization:
Sovam Teleport Kiev
>Environment:

	Motherboard SuperMicro P6DGS with aic7895 on-board, 3x9Gb IBM DDRS
	HDDs

>Description:

	While booting kernel detects SCSI controller successfully, but
	later panics with such messages on console:

	(probe0:ahc0:0:1:7): parity error during Data-In phase
	SEQADDR == 0x111 (may be 0x110 and 0x112)
	SCSIRATE == 0x88
	[ ... ]
	(probe2:ahc0:0:2:7): parity error during Data-In phase
	SEQADDR == 0x112 (may be 0x110 and 0x111)
	SCSIRATE == 0x88
	[ ... ]
	(probe1:ahc0:0:1:7): parity error during Data-In phase
	SEQADDR == 0x110 (may be 0x111 and 0x112)
	SCSIRATE == 0x88

	At the same time on the 2nd console appear such message:

	Fatal trap 12
	fault virtual address = 0x8
	fault code = supervisor read, page not present
	instruction pointer = 0x8:0xf015fae1
	stack pointer = 0x10:0xf60efac8
	frame pointer = 0x10:0xf60efad4
	code segment = base 0x0, limit 0xfffff, type 0x16
			DPL 0, pres 1, def32 1, gran 1
	processor eflags = interrupt enabled, resume, IOPL = 0
	current process = 1 (sysinstall)
	interrupt mask =
	trap number = 12

>How-To-Repeat:

	Boot from distribution floppies (kernfs.flp and mfsroot.flp)

>Fix:

	Don't know, but need it ASAP! :-)

>Release-Note:
>Audit-Trail:
>Unformatted:


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