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Date: Fri, 8 Dec 2006 18:50:00 GMT
From: Hansi_62<i.need.help@gmx.net>
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Cc: 
Subject: misc/106490: atapicam fails with ATAPI-CD/DVD drives attached to
	IDE-Raid Controllers
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>Number:         106490
>Category:       misc
>Synopsis:       atapicam fails with ATAPI-CD/DVD drives attached to IDE-Raid Controllers
>Confidential:   no
>Severity:       critical
>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:
>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: