Problems remastering the ISO
Hi List,
I'm trying to follow the instrux at http://www.knoppix.net/wiki/Knoppix_Remastering_Howto with the KNOPPIX_V6.2.1CD-2010-01-31-EN.iso image. I'm remastering using QEMU where I have a 8GB partition and boot the Knoppix disc as the cdrom.
My goal is to add 4-5 apps to my custom build but not really change anything else. I was able to mount, chroot and apt-get my apps.
AFAICT, the problems begin after I leave chroot and start the mkisofs part. The HowTo has several flavors of this command yet none were working for me. I would end up with a ~/master/KNOPPIX/KNOPPIX compressed file ~8-16MB depending on which variant of the mkisofs command I followed.
My latest build "worked" which gave me a >831MB compressed image and the Live CD ISO build gave me a ~836MB ISO - which would have been fine if it would have booted :( I got the following errors when I tried to boot the new ISO (again using QEMU on Linux):
Knoppix 6 found at: /dev/sr0
>>> Starting in Live-Mode. <<<
>>> Please do not remove mediom until shutdown! <<<
/init: line 693: /bin/mount: not found
/init: exec: line 742: /sbin/init: not found
Is there an updated Remastering Howto around or can someone please assist. I'm unclear on why the Howto model isn't working when (I think) I'm following the instrux pretty close to the letter.
Help please,
Job
Re: Problems remastering the ISO
I did not modify minirt.gz. I added a couple of packages with apt-get and removed a few which were unneeded to save space and yet the image size grew larger - even with cleaning up with deborphan and apt-get clean.
I tried a slight modification which was rather than using my QEMU VM to build it in, I tried remastering by booting the system with the KNOPPIX CD and following the intrux even more closely but with the same results -- a larger ISO size and an image that won't boot. The system has 2 GB of memory so I didn't bother with making the swap image.
I am curious about a few of things:
1.) When I build the compressed image, I have unmounted /proc and left chroot, right? After leaving chroot, the source "/dev" folder is still populated. Is this expected?
2.) How sensitive is the location where the mkisofs commands are executed?
3.) I'm using the create_compressed_fs command provided with the Knoppix 6.2.1 disk yet I saw some comments regarding a newer version. Shouldn't the one that came with the disk be sufficient?
4.) What kind of troubleshooting should I try next? e.g. Is there a test script to run on the KNOPPIX image or the final ISO to test integrity?
Thanks,
Job
Re: Problems remastering the ISO
FWIW, the host system is a 32-bit P4 with Hyperthreading enabled. I went through everything again by booting the system with the original Knoppix 6.2.1 disk and testing the resulting .iso with QEMU.
One thing to note is that there was no .rr_moved file/folder in the source after remastering. The HowTo says to remove it but I didn't have one.
Here is a portion of my log:
Code:
root@Microknoppix:/mnt/sda2/root/KNOPPIX# mkisofs -R -U -V "KNOPPIX.net filesystem" -publisher "KNOPPIX www.knoppix.net"
-hide-rr-moved -cache-inodes -no-bak -pad knx/source/KNOPPIX
| nice -5 /usr/bin/create_compressed_fs - 65536 > knx/master/KNOPPIX/KNOPPIX
Warning: creating filesystem that does not conform to ISO-9660.
2 processor core(s) detected
Warning, number as file string found. Assuming old command syntax and
choosing compatible parameters (-m -B 65536). See the usage info (-h)
for better/correct parameters.
Block size 65536, expected number of blocks: 2147483647
Ignoring file sm.bak
Ignoring file trusted.gpg~
Ignoring file mplayer.conf~
Using bt8xx000 for ./.rr_moved/bt8xx (bt8xx)
<snip>
99.87% done, estimate finish Thu Nov 4 11:45:23 2010
[ 9] Blk# 32500, [ratio/avg. 46%/ 38%], avg.speed: 2909816 b/s, ETA: 131416s
Total translation table size: 0
Total rockridge attributes bytes: 9654685
Total directory bytes: 28191440
Path table size(bytes): 141180
Max brk space used 47f4000
1041322 extents written (2033 MB)
Statistics:
gzip(0): 0 ( 0%)
gzip(1): 0 ( 0%)
gzip(2): 0 ( 0%)
gzip(3): 0 ( 0%)
gzip(4): 0 ( 0%)
gzip(5): 0 ( 0%)
gzip(6): 0 ( 0%)
gzip(7): 0 ( 0%)
gzip(8): 0 ( 0%)
gzip(9): 32542 (1e+02%)
7zip: 0 ( 0%)
Writing index for 32542 block(s)...
Writing compressed data...
root@Microknoppix:/mnt/sda2/root/KNOPPIX# ls -l knx/master/KNOPPIX/KNOPPIX
-rw-r--r-- 1 root root 824974599 Nov 4 11:45 knx/master/KNOPPIX/KNOPPIX
root@Microknoppix:/mnt/sda2/root/KNOPPIX# md5sum /mnt-system/boot/isolinux/minirt.gz /mnt/sda2/root/KNOPPIX/knx/master/boot/isolinux/minirt.gz
8dac243b731c1d32036874b31a2776ac /mnt-system/boot/isolinux/minirt.gz
8dac243b731c1d32036874b31a2776ac /mnt/sda2/root/KNOPPIX/knx/master/boot/isolinux/minirt.gz
root@Microknoppix:/mnt/sda2/root/KNOPPIX/knx# cd knx/master
root@Microknoppix:/mnt/sda2/root/KNOPPIX/knx/master# find -type f -not -name sha1sums -not -name boot.cat -not -name isolinux.bin -exec sha1sum '{}' \; > KNOPPIX/sha1sums
root@Microknoppix:/mnt/sda2/root/KNOPPIX/knx/master# mkisofs -pad -l -r -J -v -V "KNOPPIX" -no-emul-boot -boot-load-size 4 -boot-info-table -b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat -hide-rr-moved -o /mnt/sda2/root/KNOPPIX/knoppix.iso /mnt/sda2/root/KNOPPIX/knx/master
genisoimage 1.1.10 (Linux)
Scanning /mnt/sda2/root/KNOPPIX/knx/master
Scanning /mnt/sda2/root/KNOPPIX/knx/master/KNOPPIX
Scanning /mnt/sda2/root/KNOPPIX/knx/master/KNOPPIX/modules
Scanning /mnt/sda2/root/KNOPPIX/knx/master/boot
Scanning /mnt/sda2/root/KNOPPIX/knx/master/boot/isolinux
Excluded by match: /mnt/sda2/root/KNOPPIX/knx/master/boot/isolinux/boot.cat
Writing: Initial Padblock Start Block 0
Done with: Initial Padblock Block(s) 16
<snip>
99.68% done, estimate finish Thu Nov 4 12:00:33 2010
Total translation table size: 2048
Total rockridge attributes bytes: 3835
Total directory bytes: 10240
Path table size(bytes): 70
Done with: The File(s) Block(s) 406124
Writing: Ending Padblock Start Block 406165
Done with: Ending Padblock Block(s) 150
Max brk space used 1b000
406315 extents written (793 MB)
root@Microknoppix:/mnt/sda2/root/KNOPPIX/knx/master# ls -l /mnt/sda2/root/KNOPPIX/knoppix.iso
-rw-r--r-- 1 root root 832133120 Nov 4 12:00 /mnt/sda2/root/KNOPPIX/knoppix.iso
Booting the new image with QEMU results in a loop of error messages after the
KNOPPIX 6.2 splash screen:
Code:
boot:
Could not find kernel image: knoppix
So the image is larger than I started with and I only added two packages and removed over a dozen.
Thanks,
Job
