Hi,
I thought I had described exactly where in the process mondo failed:
> It asks the first few questions (medium, storage path, compression,
> iso size, prefix, backup paths) and then bombs, with "Segmentation fault".
(What you called "you are trying to tell us in story form. ")
But I am happy to supply screenshots if that will help.

Can you please tell me how one adds a picture to a post here?
According to the Help (
http://www.pclinuxos.com/forum/index.php?action=help;page=post )
>
Attachments> If enabled, this feature allows you to attach files to your posts in much the same way as most email clients...
but it does not seem to be enabled.
Regarding your other question:
My system is a home PC with about 30GiB of data.
I wanted to create DVD images, hopefully not too many (because of compression)
and burn them afterwards.
I also have /var/log/mondoarchive.log:
=======================
Time started: Tue Apr 3 18:35:56 2012
running: dmesg -n1 > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
--------------------------------end of output------------------------------
...ran just fine. :-)
Mondo Archive v2.2.9.5-r2735 ---
http://www.mondorescue.orgrunning i386 binaries
running on i686 architecture
-----------------------------------------------------------
NB: Mondo logs almost everything, so don't panic if you see
some error messages. Please read them carefully before you
decide to break out in a cold sweat. Despite (or perhaps
because of) the wealth of messages. some users are inclined
to stop reading this log. If Mondo stopped for some reason,
chances are it's detailed here. More than likely there's a
message at the very end of this log that will tell you what
is wrong. Please read it! -Devteam
-----------------------------------------------------------
Zero...
[Main] mondoarchive.c->welcome_to_mondoarchive#101: One...
[Main] mondoarchive.c->welcome_to_mondoarchive#102: Two...
[Main] mondoarchive.c->welcome_to_mondoarchive#103: Three...
[Main] mondoarchive.c->welcome_to_mondoarchive#104: Four...
[Main] mondoarchive.c->distro_specific_kludges_at_start_of_mondoarchive#121: Unmounting old ramdisks if necessary
running: mount | grep cdrom | grep super > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
--------------------------------end of output------------------------------
...ran with res=256
running: mount | grep floppy | grep super > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
--------------------------------end of output------------------------------
...ran with res=256
[Main] libmondo-tools.c->mount_boot_if_necessary#1165: Started sub
[Main] libmondo-tools.c->mount_boot_if_necessary#1166: About to set g_boot_mountpt[0] to '\0'
[Main] libmondo-tools.c->mount_boot_if_necessary#1168: Done. Great. Seeting command to something
[Main] libmondo-tools.c->mount_boot_if_necessary#1171: Cool. Command = 'grep -v ":" /etc/fstab | grep -vE '^#.*$' | grep -E "[ ]/boot[ ]" | tr -s ' ' ' ' | cut -f1 | head -n1'
[Main] libmondo-tools.c->mount_boot_if_necessary#1175: tmp = ''
[Main] libmondo-tools.c->mount_boot_if_necessary#1221: Ended sub
[Main] libmondo-tools.c->get_kernel_version#254: g_kernel_version = 2.638000
running: rm -Rf /var/cache/mondo/changed.files* > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
--------------------------------end of output------------------------------
...ran just fine. :-)
Checking sanity of your Linux distribution
running: grep ramdisk /proc/devices > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
1 ramdisk
--------------------------------end of output------------------------------
...ran just fine. :-)
running: mount | grep -Ew 'vfat|fat|dos' | grep -vE "/dev/fd|nexdisk" > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
--------------------------------end of output------------------------------
...ran with res=256
[Main] libmondo-files.c->find_home_of_exe#360: find_home_of_exe () --- Found cmp at /usr/bin/cmp
running: mindi -V > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
Mindi v2.0.7.6-r2735
--------------------------------end of output------------------------------
...ran just fine. :-)
running: parted2fdisk -l | grep -i raid > /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.tmp 2> /root/tmp/mondo.tmp.sa8ACJ/mondo-run-prog-thing.err
--------------------------------start of output-----------------------------
--------------------------------end of output------------------------------
...ran with res=256
Done.
[Main] libmondo-devices.c->interactively_obtain_media_parameters_from_user#2188: media type = iso
[Main] libmondo-tools.c->setup_tmpdir#719: Purging old tmpdir /root/tmp/mondo.tmp.sa8ACJ
[Main] libmondo-devices.c->sensibly_set_tmpdir_and_scratchdir#2879: bkpinfo->tmpdir is being set to /root/tmp/mondo.tmp.AHOStR
[Main] libmondo-devices.c->sensibly_set_tmpdir_and_scratchdir#2883: bkpinfo->scratchdir is being set to /home/shimon/Movies/mondo.scratch.8544
[Main] libmondo-devices.c->interactively_obtain_media_parameters_from_user#2597: prefix set to mondobkp-120303
[Main] libmondo-devices.c->which_boot_loader#3102: list_drives_cmd = parted2fdisk -l 2>/dev/null | grep "/dev/.*:" | tr -s ':' ' ' | tr -s ' ' '
' | grep /dev/; echo /dev/sda
[Main] libmondo-devices.c->which_boot_loader#3115: looking at drive /dev/sda's MBR
[Main] libmondo-devices.c->which_boot_loader#3130: 1 grubs and 0 lilos
=======================
Well, in spite of the text at the top of the file, I do not see
a message at the end of the log saying what's wrong.
Thank you all very much!! I really do appreciate people's help,
Shimon