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Re: Doubts about Debian8.1 DVD ppc64el image

On 06/11/2015 05:23 PM, Thomas Schmitt wrote:

Our algorithm is
failing to discover if this iso[1] is bootable.
I am curious to learn about the expectations of that algorithm.

The ISO looks like being bootable via CHRP.
 From my cheatsheet
"CHRP is marked by an MBR partition entry of type 0x96 spanning the whole
  ISO 9660 image."

I cannot spot "ppc64el" in
Old-stable "powerpc" was made by genisoimage rather than xorriso.
It has an Apple Partition Map additionally to the CHRP MBR,
probably pointing to a HFS filesystem.

So if your algorithm looks for magic number {'E','R'}
at the start of the file, that would be what's missing in "ppc64el"
ISOs. (Together with the HFS, of course.)

In case this does not yet explain the riddle:

What was the most recent ISO which passed your tests ?
Debian 7.8 works well.

Can you run GNU xorriso >= 1.3.8 on that ISO ?
(Debian's xorriso is still at 1.3.2, i fear.)	

   xorriso -indev ...iso \
           -report_el_torito plain \
           -report_system_area plain \
i will make this test later. ASAP i send the results

Have a nice day :)



Ramon Nunes Medeiros
Kimchi Developer
Linux Technology Center Brazil
IBM Systems & Technology Group
Phone : +55 19 2132 7878

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