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Date:      Sat, 31 Aug 2013 17:54:07 +0400
From:      Slawa Olhovchenkov <slw@zxy.spb.ru>
To:        Dmitry Morozovsky <marck@rinet.ru>
Cc:        "Kenneth D. Merry" <ken@freebsd.org>, freebsd-stable@freebsd.org, Thomas Laus <lausts@acm.org>
Subject:   Re: Lost CAM Access to DVD Writer
Message-ID:  <20130831135407.GB3796@zxy.spb.ru>
In-Reply-To: <alpine.BSF.2.00.1308311742490.76768@woozle.rinet.ru>
References:  <5220F437.24888.CC3B3@lausts.acm.org> <20130831054630.GA95009@nargothrond.kdm.org> <5221E8D9.31243.A1126@lausts.acm.org> <20130831134228.GA59931@zxy.spb.ru> <alpine.BSF.2.00.1308311742490.76768@woozle.rinet.ru>

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On Sat, Aug 31, 2013 at 05:43:54PM +0400, Dmitry Morozovsky wrote:

> On Sat, 31 Aug 2013, Slawa Olhovchenkov wrote:
> 
> > > > You probably need to recompile whatever application you're using to burn
> > > > CDs.
> > > >
> > > The actual program, cdrecord, works when invoked from the command line.  The 
> > > following script does not:
> > > 
> > > EXAMPLES
> > >      Dumps the /u file system to DVDs using growisofs.  Uses a 16MB cache,
> > >      creates a snapshot of the dump, and records the dumpdates file.
> > > 
> > > /sbin/dump -0u  -L -C16 -B4589840 -P 'growisofs -Z /dev/cd0=/dev/fd/0' /u
> > > 
> > > I wonder if the recent change to devfs might be the root cause of my problem. 
> > > I have been dumping to DVD for years without any issues until now.  Maybe the 
> > > re-direction to /dev/fd/0 requires a different syntax.
> > 
> > Are you sure mount fdescfs? /dev/fd is fdescfs, not devfs.
> 
> Are you sure? At least, std* are there even if fdescfs is absent:
> 
> marck@castor:/FreeBSD/rinet/src.9/sys> kldstat -v | grep fdesc
> marck@castor:/FreeBSD/rinet/src.9/sys> ls /dev/fd
> 0  1  2

> ls /dev/fd/
0       1       2       3       4

Hmm, w/o fdescfs only std*. With fdescfs more.



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