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Message-Id: <200612081850.kB8Io08O001768@www.freebsd.org>
Date: Fri, 8 Dec 2006 18:50:00 GMT
From: Hansi_62<i.need.help@gmx.net>
To: freebsd-gnats-submit@FreeBSD.org
Subject: atapicam fails with ATAPI-CD/DVD drives attached to IDE-Raid Controllers
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>Number:         106490
>Category:       kern
>Synopsis:       [atapicam] atapicam fails with ATAPI-CD/DVD drives attached to IDE-Raid Controllers
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 08 18:50:12 GMT 2006
>Closed-Date:    
>Last-Modified:  Sat Dec 09 05:36:10 GMT 2006
>Originator:     Hansi_62
>Release:        FreeBSD 6.2 RC1
>Organization:
private
>Environment:
FreeBSD bsd.unix 6.2-RC1 FreeBSD 6.2-RC1 #0: Sat Nov 25 18:06:10 UTC 2006     root@bsd.unix:/usr/src/sys/i386/compile/MYKERNEL  i386

>Description:
FreeBSD seems to have problems with ATAPI CD/DVD-Drives attached to
IDE-RAID Controllers (no harddisks, only one DVD-Drive). When I load
atapicam with DMA enabled (hw.ata.atapi_dma = "1"), it takes a long time
until the drive is recognized (about 3 Minutes). Afterwards, I can't
mount the drive and 'cdrecord -scanbus' fails. I've tested an onboard
JMicron JMB361 Controller and a PCI-UDMA Raid Card with Sil680 Chipset.
Both with the same fault.


>How-To-Repeat:

>Fix:
Disabling DMA solves the problem. The price you have to pay for it is a
bad performance.
>Release-Note:
>Audit-Trail:
>Unformatted:
