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RE: cdrecord problem
The drive is has "burn proof" but I notice that cdrecord turns it off.
Note that the same media on the same machine burns OK with xcdroast at 24x.
cdrecord finishes without any errors - at least none that I recognize. I
will try Chris's scheme next.
From the replies I assume that this is a common type of problem??
Tom Droege
> [Original Message]
> From: Creager, Robert S <CreagRS@LOUISVILLE.STORTEK.COM>
> To: tass <tass@listserv.wwa.com>
> Date: 9/5/2003 11:58:45 AM
> Subject: RE: cdrecord problem
>
>
> I would more suspect media isn't really capable of being burned at that
> speed, or the drive really isn't capable of writing at that speed, or some
> combination of the two, but not a buffer under run. My experience with
> cdrecord is that it will fail if it experiences a buffer under run.
>
> But, if Tom has one of the newer 'burn proof' cd-writers, I believe they
> will automatically stop writing if their internal buffer gets less than
15%
> (or something like that) full, and wait for it to fill up before
continuing
> writing. I've read that the pause in writing can cause problems with some
> CD drives, if the cd-writer doesn't pick up correctly on the restart.
>
> Cheers,
> Rob
>
> > -----Original Message-----
> > From: Chris Albertson [mailto:chrisalbertson90278@yahoo.com]
> > Sent: September 05, 2003 10:48 AM
> > To: tdroege2@earthlink.net; tass
> > Subject: Re: cdrecord problem
> >
> >
> >
> > At first I thought mkisofs might be screwing up.
> > but you say the error rate depends on the recording
> > speed. I suspect now that mkiosfs is not feeding
> > cdrecord fast enough. Assuming you have 800MB of free
> > space you could try this:
> >
> > mkisofs -R -o /foobar/tempfile disk1
> > cdrecord -v fs=6m speed=12 dev=3,0 -" /foobar/tempfile
> > rm /foobar/tempfile.
> >
> > xcdroast may be able to work at 12x or faster because
> > it maintains a large buffer between mkisofs and
> > cdrecord and lets mkisofs get a good head start before
> > staring cdrecord. You are using a direct pipe. and it
> > looks to me like there is a bottle neck in the system.
> >
> > Is this an IDE CD-R device and hard disk? If so that
> > could explain it. IDE device take a huge amount of
> > CPU cycles to drive.
> >
> > --- Thomas Droege <tdroege2@earthlink.net> wrote:
> > > I am writing backup disks with the following (in
> > > perl):
> > >
> > > system "mkisofs -R disk1 | cdrecord -v fs=6m
> > > speed=12 dev=3,0 -";
> > >
> > > I just copied this line from the man pages and
> > > figures out what the dev
> > > should be.
> > >
> > > The CD recorder is a 32x device for write. the sub
> > > directory disk1
> > > contains 80 ea. 8 megabyte images. The CDs I am
> > > using are rated at 24x.
> > >
> > > About once a directory write, one of the files gets
> > > written as a directory.
> > > It is then unreadable. At least for me and the
> > > utilities that I have
> > > tried. The buffer never gets below 97%. Sometimes
> > > it writes garbage as the
> > > CD directory. An ls gets garbage that I can
> > > recognize as part of a fits
> > > header. I have tried recording at different speeds.
> > > 24x gets mostly
> > > garbage. 12x gets about 1 file per 80 file block as
> > > a directory. All but
> > > the file shown as a directory are readable by Gimp.
> > > The computer is a 1.5
> > > Ghz dual processor Athelon.
> > >
> > > I recall seeing this problem using xcdroast in the
> > > previous Mandrake 8.1.
> > > I am now using 9.0.
> > >
> > > I seem to be able to record perfectly every time
> > > from the same directory
> > > "on the fly" using xcdroast at 24x (the CDs are
> > > rated at 24x).
> > >
> > > Has anyone seen this problem and can recommend what
> > > I should do?
> > >
> > > Tom Droege
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > =====
> > Chris Albertson
> > Home: 310-376-1029 chrisalbertson90278@yahoo.com
> > Cell: 310-990-7550
> > Office: 310-336-5189 Christopher.J.Albertson@aero.org
> > KG6OMK
> >
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