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mkisofs not genisoimage



In the last 2 fedoras, in opensuse 10.3, and at least Mandriva2008, all have soft linked 'mkisofs' to genisoimage, as if they were the same, or at least performed equally.

Not so.

>From "info grub" I got this info and used it and would still like to use it, rather than floppys or pendrives.  I keep my windows MBR clean by using 'diskprobe' and 'disksave' after a linux install - reinstalling a clean MBR.

To boot linux I then used 'mkisofs' from the "info grub" to make a bootable grub CD:

<quote>3.4 Making a GRUB bootable CD-ROM
=================================
<snip>
   Here is an example of procedures to make a bootable CD-ROM image.
First, make a top directory for the bootable image, say, `iso':

     $ mkdir iso

   Make a directory for GRUB:

     $ mkdir -p iso/boot/grub

   Copy the file `stage2_eltorito':

     $ cp /usr/lib/grub/i386-pc/stage2_eltorito iso/boot/grub

   If desired, make the config file `menu.lst' under `iso/boot/grub'
(*note Configuration::), and copy any files and directories for the
disc to the directory `iso/'.

   Finally, make a ISO9660 image file like this:

     $ mkisofs -R -b boot/grub/stage2_eltorito -no-emul-boot \
         -boot-load-size 4 -boot-info-table -o grub.iso iso
<snip>
</quote>

Genisoimage doesn't make a bootable CD, at least not with these parameter - and nothing I've tried so far works.

Can someone can tell me the correct options?  Or even if genisoimage is capable of doing what 'mkisofs' did?

I know I can boot from floppy (but floppys are disappearing), or pendrive (if I wan't a pendrive to shrink to 1.44MB).  I really don't like losing the bootable grub CD option.

Thanks for any clarification.

lynnevan
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