Re: Problems when writing DVDs with growisofs
From: Bill Davidsen <davidsen@tmr.com>
Subject: Re: Problems when writing DVDs with growisofs
Date: Wed, 05 Jul 2006 17:32:18 -0400
The problem has been "solved" (moved):
For the device of my DVD-burners there was "pktsetup" (for writing to
DVDRAM) called via a initscript from which I dont know that it was
aktivated.
Ok, I can now read my DVD successfully and completly.
But it remains the question, why I should not read my my DVDRAM now
completly...
Sigh...
mcc
> Meino Christian Cramer wrote:
>
> >Hi,
> >
> >The System
> >=========
> >Softwware:
> >Gentoo Linux (recent stable) with Linux kernel 2.6.17.3 (vanilla
> >source).
> >* growisofs by <appro@fy.chalmers.se>, version 6.1,
> > front-ending to mkisofs: mkisofs 2.0 (i686-pc-linux-gnu)
> >readcd 1.11a15 (i686-pc-linux-gnu) Copyright (C) 1987, 1995-2001 Jörg Schilling
> >dd (coreutils) 5.94
> >
> >Hardware:
> >1GB RAM
> >Athlon 64 X2 3800+
> >Asus Av8 motherboard
> >LG 4163B DVD/CD/DVDRAM burner
> >
> >
> >
> >The problem:
> >Recordings from a DVB-T receiver were copied to a DVD+RW medium. The
> >files:
> >
> >-r--r--r-- 1 mccramer users 1205874688 Jul 5 16:59 2006-04-02_20-15_Ice_Age.mpg
> >-r--r--r-- 1 mccramer users 1492150272 Jul 5 17:01 2006-06-27_22-15_Twister.mpg
> >-r--r--r-- 1 mccramer users 1754710016 Jul 5 17:04 2006-06-28_20-15_Final_Fantasy.mpg
> >
> >Sum of all filesizes: 4452734976
> >
> >I wrote the files with varying parameter;
> >
> >growisofs -Z /dev/hdd 2006-04-02_20-15_Ice_Age.mpg \
> >2006-06-27_22-15_Twister.mpg 2006-06-28_20-15_Final_Fantasy.mpg
> >
> >and
> >
> >growisofs -Z /dev/hdd 2006-04-02_20-15_Ice_Age.mpg \
> >2006-06-27_22-15_Twister.mpg 2006-06-28_20-15_Final_Fantasy.mpg -udf
> >
> >and
> >
> >growisofs -dvd-compat -Z /dev/hdd 2006-04-02_20-15_Ice_Age.mpg \
> >2006-06-27_22-15_Twister.mpg 2006-06-28_20-15_Final_Fantasy.mpg -udf
> >
> >None of the processes reports any error neither on user level nor in
> >the kernel log files.
> >
> >After each process I ejected the medium and inserted it again and
> >mounted the medium first with "-t iso9660" and cat'ed all files
> >to /dev/null.
> >
> >Short before end an I/O-Error happens and was logged to the kernel log
> >file as:
> >
> > attempt to access beyond end of device
> > hdd: rw=0, want=8388608, limit=8388604
> > Buffer I/O error on device hdd, logical block 2097151
> > attempt to access beyond end of device
> > hdd: rw=0, want=8388612, limit=8388604
> > Buffer I/O error on device hdd, logical block 2097152
> > attempt to access beyond end of device
> > hdd: rw=0, want=8388616, limit=8388604
> > Buffer I/O error on device hdd, logical block 2097153
> > attempt to access beyond end of device
> > hdd: rw=0, want=8388608, limit=8388604
> > Buffer I/O error on device hdd, logical block 2097151
> >
> >Then I unmounted the medium and mounted again with "-t udf" where
> >appropiate (see above).
> >
> >Again the cat-process failed as described above.
> >
> >Then I umounted the device and uses dd to copy an image of the dvd to
> >my harddisk:
> >
> >dd if=/dev/hdd of=/tmp/dvd.iso
> >
> >The processes reports no error neither on user level nor in
> >the kernel log files.
> >
> >I mounted the image via loop-device and tried again to cat all files
> >to /dev/null which again fails as described above.
> >
> >Then I used readcd to create an image of the dvd. Also this process
> >does not report any error.
> >
> >I mounted the image via loop device and THIS time I was able to
> >retrieve all files. They were identical to the originals.
> >
> >
> >I am near desparation. I cannot find the reason for this
> >behaviour. Since I copy more valuable data as some dvb-t recordings to
> >DVD I would be happy to have a reliable scheme how to copy
> >successfully files to DVD+RW and other media.
> >
> >Thank you very much in advance for any help !
> >
> >Kind regards,
> > Meino Cramer
> >
> >PS: I tried to subscribe to this mailinglist, I was told, that a
> >conformation mail will be send to me. But no mail arrives me. So I am
> >unsubscribed yet and would be happy, if - when replying to this mail -
> >one could CC: me. Thanks!
> >
> >
> Try using the 'blockdev' command to set the readahead to 4k, and see if
> that solves the problem. If so, let's prepare a polite note to the
> kernel list, something like "no this isn't fixed after all."
>
> --
> bill davidsen <davidsen@tmr.com>
> CTO TMR Associates, Inc
> Doing interesting things with small computers since 1979
>
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