Fw: [Sussex] Problem writing image to CD
Brendan Whelan
b_whelan at mistral.co.uk
Wed Oct 12 07:25:07 UTC 2005
Steve,
Thanks for the response. My next step will be to use a standard CD writer
rather than the half height
combi drive. That way I will be able to determine whether it is the Fedora
operating system or the drive. If it is the combi drive that is giving the
problem then I will look at firmware updates or possible getting a different
brand of drive.
In any event, I need a combi (half-height) drive to fit into the Dell
rack-mounted server. I will let the group know the outcome.
Brendan
----- Original Message -----
From: "Stephen Williams" <sdp.williams at btinternet.com>
To: "LUG email list for the Sussex Counties" <sussex at mailman.lug.org.uk>
Sent: Tuesday, October 11, 2005 11:06 PM
Subject: Re: Fw: [Sussex] Problem writing image to CD
> On Tue, 2005-10-11 at 21:21 +0100, Brendan Whelan wrote:
> > Hi,
> >
> > I still haven't managed to be able to write a CD from a cron job - it is
> > still the same pattern i.e. the LED flashes for about 20 minutes and
then
> > goes on steady. The image file is only 76Mb and the writing process
works
> > fine when run through a terminal window.
> >
> > I have checked the following:
> > /etc/acpi/actions/ is empty
> > /etc/acpi/events/ just contains sample.conf so, presumably, there are
no
> > power saving settings.
> >
> > dmesg log contains:
> > Probing IDE interface ide0...
> > hda: TSSTcorpCD-RW/DVD-ROM TSL462C, ATAPI CD/DVD-ROM drive
> >
> > messages log
> > Oct 11 20:11:19 localhost kernel: hda: TSSTcorpCD-RW/DVD-ROM TSL462C,
ATAPI
> > CD/DVD-ROM drive
> >
> > I was wondering whether the particular combo model was part of the
problem.
> > It is a Toshiba Samsung TS-L462 and some users have reported odd
problems.
> >
> > Any suggestions?
> >
>
> I can't really help you much more Brendan. I'm stumped.
>
> Steve Williams.
>
> > Regards, Brendan
> > ----- Original Message -----
> > From: "Brendan Whelan" <b_whelan at mistral.co.uk>
> > To: "LUG email list for the Sussex Counties" <sussex at mailman.lug.org.uk>
> > Sent: Monday, October 10, 2005 1:11 PM
> > Subject: Re: Fw: [Sussex] Problem writing image to CD
> >
> >
> > > Steve,
> > >
> > > Thanks for the responses. I had a look and there are no options in the
> > BIOS
> > > for setting timeouts.
> > > I increased the writing speed from 4x to 10x but the pattern was still
the
> > > same i.e. the led on the drive flashed for several minutes and then
came
> > on
> > > steady.
> > > I will reboot and try to write to a CDR at 24x.
> > > I still find it bizarre that the script to burn the CD works fine from
a
> > > terminal window, under Root, but when run on the cron queue, using the
> > > default (presumably Root) user, I can only write very small images!
> > >
> > > Any information on apm or acpi settings or any other suggestions will
be
> > > much appreciated.
> > >
> > > Regards, Brendan
> > >
> > > ----- Original Message -----
> > > From: "Stephen Williams" <sdp.williams at btinternet.com>
> > > To: "LUG email list for the Sussex Counties"
<sussex at mailman.lug.org.uk>
> > > Sent: Sunday, October 09, 2005 9:52 PM
> > > Subject: Re: Fw: [Sussex] Problem writing image to CD
> > >
> > >
> > > > On Sun, 2005-10-09 at 20:30 +0100, Brendan Whelan wrote:
> > > > > Hi,
> > > > >
> > > > > I have looked up the spec for the CDRW combo drive - Toshiba
Samsung
> > > claim
> > > > > 24x when writing to a CDR and 10x when writing to a CDRW.
> > > > > So I could take my writing speed up from 4x to 10x.
> > > > >
> > > > > Brendan
> > > > > ----- Original Message -----
> > > > > From: "Brendan Whelan" <b_whelan at mistral.co.uk>
> > > > > To: <sdp.williams at btinternet.com>; "LUG email list for the Sussex
> > > Counties"
> > > > > <sussex at mailman.lug.org.uk>
> > > > > Sent: Sunday, October 09, 2005 3:55 PM
> > > > > Subject: Re: [Sussex] Problem writing image to CD
> > > > >
> > > > >
> > > > > > Thanks for the responses.
> > > > > >
> > > > > > I don't have the system powered up at the moment.
> > > > > > I had wondered about some sort of time out problem -where can I
find
> > > the
> > > > > > settings for apm or acpi?
> > > > > > I am only recording at x4 on a modern 3GHz system - is there a
way
> > of
> > > > > > finding out the maximum speed at which I can record?
> > > > > >
> > > >
> > > > I'd look in the BIOS first - there may be an option to power down
the
> > > > drives in BIOS Power Management. Beyond that I'd suggest you talk to
> > > > Steve Dobson for advice on linux apm and acpi.
> > > >
> > > > I find some CD-RW drives only write at lower speeds than the drive
spec
> > > > and disk spec would suggest. I'm not sure why this is.
> > > >
> > > > Steve W.
> > > >
> > > >
> > > > > > Thanks, Brendan
> > > > > > > down
> > > > > > ----- Original Message -----
> > > > > > From: "Stephen Williams" <sdp.williams at btinternet.com>
> > > > > > To: "LUG email list for the Sussex Counties"
> > > <sussex at mailman.lug.org.uk>
> > > > > > Sent: Sunday, October 09, 2005 12:50 PM
> > > > > > Subject: Re: [Sussex] Problem writing image to CD
> > > > > >
> > > > > >
> > > > > > > On Fri, 2005-10-07 at 21:28 +0100, Brendan Whelan wrote:
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > > I have created a backup shell script which exports a
database,
> > > gathers
> > > > > > > > files, creates a CD image file and then writes it to a CD.
> > > > > > > > The shell script is then scheduled to run during the night.
> > There
> > > are
> > > > > > > > a pair of, logically identical, systems one a Dell tower and
the
> > > other
> > > > > > > > a Dell rack mountable servers. (Fedora Core 3 is used on
both
> > > > > > > > systems.) The shell script works perfectly on the tower
system
> > but
> > > on
> > > > > > > > the rack mounted machine the CD writing fails. The image to
be
> > > copied
> > > > > > > > is only about 360Mb, I have used different manufacturers CDs
but
> > > the
> > > > > > > > problem persists. I changed the CD drive but the problem
> > persists.
> > > > > > > >
> > > > > > > > I have taken an image copy of the offending system and
placed it
> > > my
> > > > > > > > test system with the same type of CD writer which is in the
rack
> > > > > > > > mountable system.
> > > > > > > > To simplify the problem I created a shell script which just
> > > > > > > > contains the line which writes to the CD. When I run the
script
> > > in a
> > > > > > > > terminal window it works. When I run it as a cron job it
fails.
> > > The
> > > > > > > > led on the CD writer flashes for a number of minutes and
then
> > goes
> > > on.
> > > > > > > > The CD cannot be unmounted and the only way to extract the
CD is
> > > to
> > > > > > > > either power the system down and back up or to use a paper
clip
> > to
> > > > > > > > release the CD drawer. (As an aside small image files can be
> > > written
> > > > > > > > to the CD using a cron job.)
> > > > > > > >
> > > > > > > > Any suggestions as to what might be causing the problem or
how I
> > > could
> > > > > > > > find out more information.
> > > > > > >
> > > > > > > My suspicions centre around power saving. Is apm or acpi set
to
> > > power
> > > > > > > down the CD-RW in the rackmount box and not in the tower box
for
> > > > > > > example. Perhaps the user account under which the cron job is
run
> > > needs
> > > > > > > sufficient authority to be able to prevent power down signals
from
> > > > > > > affecting the CD-RW when a job is in progress? Might be
something
> > > worth
> > > > > > > investigating.
> > > > > > >
> > > > > > > Steve W.
> > > > > > >
> > > > > > >
> > > > > > > >
> > > > > > > > Thanks, Brendan
> > > > > > > > _______________________________________________
> > > > > > > > Sussex mailing list
> > > > > > > > Sussex at mailman.lug.org.uk
> > > > > > > > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > > > > > > > http://mailman.lug.org.uk/mailman/listinfo/sussex
> > > > > > >
> > > > > > >
> > > > > > > _______________________________________________
> > > > > > > Sussex mailing list
> > > > > > > Sussex at mailman.lug.org.uk
> > > > > > > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > > > > > > http://mailman.lug.org.uk/mailman/listinfo/sussex
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > _______________________________________________
> > > > > > Sussex mailing list
> > > > > > Sussex at mailman.lug.org.uk
> > > > > > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > > > > > http://mailman.lug.org.uk/mailman/listinfo/sussex
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > Sussex mailing list
> > > > > Sussex at mailman.lug.org.uk
> > > > > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > > > > http://mailman.lug.org.uk/mailman/listinfo/sussex
> > > >
> > > >
> > > > _______________________________________________
> > > > Sussex mailing list
> > > > Sussex at mailman.lug.org.uk
> > > > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > > > http://mailman.lug.org.uk/mailman/listinfo/sussex
> > > >
> > > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Sussex mailing list
> > > Sussex at mailman.lug.org.uk
> > > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > > http://mailman.lug.org.uk/mailman/listinfo/sussex
> > >
> > >
> >
> >
> >
> > _______________________________________________
> > Sussex mailing list
> > Sussex at mailman.lug.org.uk
> > Sussex LUG Website: http://www.sussex.lug.org.uk/
> > http://mailman.lug.org.uk/mailman/listinfo/sussex
>
>
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