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Date:      Mon, 08 Mar 2010 10:36:15 +0200
From:      Andriy Gapon <avg@icyb.net.ua>
To:        Joe Marcus Clarke <marcus@marcuscom.com>
Cc:        gnome@freebsd.org
Subject:   Re: hald vs dvd+rw
Message-ID:  <4B94B6FF.2040303@icyb.net.ua>
In-Reply-To: <1268011256.96436.24.camel@shumai.marcuscom.com>
References:  <4B8FEA6D.4050607@icyb.net.ua> <1268011256.96436.24.camel@shumai.marcuscom.com>

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on 08/03/2010 03:20 Joe Marcus Clarke said the following:
> On Thu, 2010-03-04 at 19:14 +0200, Andriy Gapon wrote:
>> It seems that hald behavior might be causing some issues with re-writing DVD±RW
>> media.  I specifically mean the case when media already contains CD9660 or UDF
>> filesystem and is being re-written with new data.
>> It seems that when hald notices old volume going away, it attempts to re-taste the
>> media while a burning program, e.g. growisofs, may be writing data to the media.
>> At the very least it produces messages in system log like the following:
>> kernel: (cd0:ahcich5:0:0:0): READ TOC/PMA/ATIP. CDB: 43 0 0 0 0 0 0 0 4 0
>> kernel: (cd0:ahcich5:0:0:0): CAM status: SCSI Status Error
>> kernel: (cd0:ahcich5:0:0:0): SCSI status: Check Condition
>> kernel: (cd0:ahcich5:0:0:0): SCSI sense: NOT READY asc:4,8 (Logical unit not
>> ready, long write in progress)
>>
>> At the worst, it causes confusion for the burning program.
>> This happens with recent versions of 9-CURRENT and 8-STABLE, when using atacam and
>> ahci driver for programs like growisofs from dvd+rw-tools and cdrecord from
>> cdrecord-devel.  And, of course, for frontends that use those as backends.
>>
>> I am not sure how to resolve this properly.
>> Perhaps, hald could have a special treatment for 'Logical unit not ready, long
>> write in progress' sense from TEST UNIT READY command.
> 
> Have you followed the steps at
> http://www.freebsd.org/gnome/docs/halfaq.html#q6 to lock the device in
> hal, and prevent access while burning your media?

No, I haven't.  Thank you for the information!
OTOH, I tried burning with k3b (from k3b-kde4), which is supposed to be smart
about hal, but got exactly the same issue.


-- 
Andriy Gapon



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