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Date:      Mon, 14 Jul 1997 17:49:58 +0200 (MET DST)
From:      pi@complx.lf.net
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   kern/4089: ccd0 hangs in newfs?
Message-ID:  <m0wnnNu-00050KC@complx.lf.net>
Resent-Message-ID: <199707141600.JAA28483@hub.freebsd.org>

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>Number:         4089
>Category:       kern
>Synopsis:       if doing a newfs on a ccd device, system hangs
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 14 09:00:01 PDT 1997
>Last-Modified:
>Originator:     Kurt Jaeger
>Organization:
MfG/Best regards, Kurt Jaeger                                  23 years to go !
LF.net GmbH        pi@LF.net
Vor dem Lauch 23   fon +49 711 90074-23
D-70567 Stuttgart  fax +49 711 7289041
>Release:        FreeBSD 2.2.2-RELEASE i386
>Environment:

	586 Intel system, ccd configured into kernel
	Adaptec 2940U or 2940 controller,
	IBM DCAS-34330 S60B
	QUANTUM FIREBALL_TM3200S 300X
	3COM 3C905 Fast Etherlink XL PCI
	2.2.2 RELEASE

>Description:

	if a ccd device is configured (ccdconfig -C -v)
	and newfs runs on that ccd0c, the systems hungs
	at different locations into the newfs.
	Sometimes it can work its way through it, sometimes
	it failes.
	Seems to happen more reliable if the two disks used
	for this have different speeds.
	Happens even if disk IO is down to 5 MB/sec and
	newfs is niced to -20.

>How-To-Repeat:

	clean install
	made ccd kernel
	configured ccd device
	newfs -> hungs

>Fix:
	
	do not use newfs on ccd devices 8-}

>Audit-Trail:
>Unformatted:



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