Message-ID: <47E8142D.4040301@garzik.org>
Date: Mon, 24 Mar 2008 16:50:53 -0400
From: Jeff Garzik <jeff@garzik.org>
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To: Gregor Jasny <gjasny@googlemail.com>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       linux-ide@vger.kernel.org
Subject: Re: Burning CDs as user produces coasters (Plextor drive)
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Gregor Jasny wrote:
> Hi,
> 
> since some time burning ISO CD images as user fails.
> Wodim stops during OPC and the kernel prints some messages:
> 
> scsi: unknown opcode 0xe9
> scsi: unknown opcode 0xed
> scsi: unknown opcode 0xf5
> scsi: unknown opcode 0xeb
> 
> If I burn as root, everything works fine. The used CD writer is a
> "PLEXTOR  DVDR   PX-712A   1.09". I've seen in the wodim/cdrecord
> sources that plextor drives are handled different from other drives.
> 
> Do you know what the above listed commands are for?
> Maybe they could be included in blk_verify_command?
> If your'e not sure about the dangerousness maybe as a config option?

What drivers and kernel versions work (and which fail)?

	Jeff


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