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Date:      Sun, 6 Jul 1997 16:25:25 +0200 (CEST)
From:      news@news.LF.net
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   kern/4039: 2940UW, IBM DCAS 32160 -- hungs if ultra speed (40 MB/sec) selected
Message-ID:  <m0wksFh-000HyvC@news.LF.net>
Resent-Message-ID: <199707061430.HAA24091@hub.freebsd.org>

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>Number:         4039
>Category:       kern
>Synopsis:       2940UW and DCAS 32160 -- hungs if 40 MB/sec is selected and used
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jul  6 07:30:00 PDT 1997
>Last-Modified:
>Originator:     LF.net News Administration
>Organization:
LF.net GmbH
>Release:        FreeBSD 2.2.2-RELEASE i386
>Environment:

	Installed 2.2.2 in a maschine with four DCAS 32160 drives
	on a adaptec 2940UW.

>Description:

	doing a newfs on the second drive while doing I/O will
	cause a system hung (no response, no reboot), if
	40 MB/sec was selected as IO-speed for each SCSI drive
	in the adaptec BIOS. Will hung not always, but very often.

>How-To-Repeat:

	install a complete system on SCSI ID 0.
	do a newfs on SCSI ID 1 or a newfs on the ccd containing
	all of sd1, sd2, sd3.
	The system will hang in most of the cases (responses to ping,
	but not disk IO).

>Fix:
	
	Select 20 MB/sec and it works.
	I will test it soon as a news server, whether it will cope with
	the load.

>Audit-Trail:
>Unformatted:



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