--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: "Read image from CD" produces corrupt images with no warnings.
- From: Donovan Baarda <abo@minkirri.apana.org.au>
- Date: Sun, 01 Jul 2001 22:24:22 +1000
- Message-id: <20010701122422.47CFA4489@ngapa.localdomain.fake>
Package: gcombust
Version: 0.1.45-1
Severity: grave
Description:
Reading images to a file using the "Read image from CD" button on the
"Burn" tab produces a corrupt image. No warnings that the image is
corrupt are displayed.
How-To-Repeat:
Read an image from a CD, preferably something big with heaps of
multimedia stuff on it (wav's, mpg's, avi's etc seem to produce more
errors) into a file "temp.raw" using gcombust. Then do the following as
root and see all the differences;
mount /cdrom
mount temp.raw /mnt -o loop
diff -rq /cdrom /mnt
Alternatively, read the CD into an image called "temp2.raw" using
something else that works, and diff it with the gcombust produced
"temp.raw".
Fix:
don't read images using gcombust. Using "cat /dev/cdrom >image.raw"
works more reliably, but will produce a slightly oversized image and an
error message at the end as it attempts to read the runnout blocks. Use
the "-isosize" option on cdrecord for these images. If you know the
image size, "head -c <size> /dev/cdrom >image.raw" works reliably for me
(images read this way pass the recursive diff test every time on my
system).
I'm not sure what gcombust uses to read CD images, but it doesn't work
on my 2.2.19 kernel system. Note that I'm using ide-scsi emulation on my
ide CDROM and CDRW.
-- System Information
Debian Release: newton + woody hybrid
Architecture: i386
Kernel: Linux ngapa 2.2.19 #1 Thu Apr 5 15:18:02 EST 2001 i686
Locale: LANG=C, LC_CTYPE=C
Versions of packages gcombust depends on:
ii cdrecord 3:1.9-1 A command line CD/DVD writing tool
ii libc6 2.2.3-1 GNU C Library: Shared libraries an
ii libglib1.2 1.2.8-1 The GLib library of C routines
ii libgtk1.2 1.2.10-1 The GIMP Toolkit set of widgets fo
ii mkisofs 4:1.10-1 Creates ISO-9660 CD-ROM filesystem
ii xlibs 4.0.3-3 X Window System client libraries
--- End Message ---