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mkisofs questions


I have some questions about mkisofs (I'm using verion 4:2.0+a19-1, but it is more about mkisofs in gereral)

1. Is it, or is is not, possibele to make a good/working/official image that is > 4GB. (just with a lot of files with a size from 1 KB to a max. of 100MB, so not the problem about that the iso9660 can not contains a file > 2GB)

(if yes: why is the Debian DVD image not > 4 GB ?)

2. why are there in some images mkisofs information and others not ?

for example
cat /cdrs/redhat90-1.iso |more

mkisofs 1.14 -A Red Hat Linux/i386 9 -V Red Hat Linux/i386 9 -J -R -v -T -x ./lost+found -o /mnt/redhat/scratch/Shrike-RHN-respin/i386/ftp-isos/Shrike-rhn-respi n-i386-disc1-ftp.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table

But other images doesn't contain this info, why ?
And how can I enable/disable it ?

3. If I boot a download image with
"-b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table" I can boot from CD, If I mount the cdimage and copy the stuff to HD and add a file and than do a "mkisofs .. -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table ... " my iso is not bootable on a lot of machines, why ?
Must I do something more, change anything ?

And what is the difference between isolinux and syslinux/El Torito ?


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