Updated partition offset wike about GRUB experiment
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@ -104,10 +104,42 @@ cutting off the first partition_offset blocks of 2 KB:
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--------------------------------------------------------------------------
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Another test was made with GRUB 2 by downloading
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{{{
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bzr branch http://bzr.savannah.gnu.org/r/grub/trunk/grub
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}}}
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Before building GRUB 2, the file
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{{{
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util/grub-mkrescue.in
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}}}
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was edited to replace in the options of the xorriso command:
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{{{
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--protective-msdos-label
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}}}
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by
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{{{
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-partition_offset 16 -no-pad --no-emul-toc
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}}}
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Then GRUB 2 was built and installed.
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The resulting image from
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{{{
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./grub-mkrescue -o image.iso
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}}}
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was put onto USB stick. It passed the same tests on Debian
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as above RIPLinux example. It boots to a GRUB prompt.
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Due to options -no-pad --no-emul-toc the image is about 300 kB smaller than
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the image produced by original grub-mkrescue. Else it would have grown by
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about 130 kB.
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--------------------------------------------------------------------------
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Open questions:
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- Shall the partition of an isohybrid image be marked bootable ?
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Currently xorriso keeps the 0x80 mark of an eventually imported MBR
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Currently xorriso keeps the 0x80 mark of an eventually imported MBR
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resp. the 0x80 mark which xorriso eventually sets by its own MBR
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preparations.
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- If not to be marked bootable:
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