[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Doubts about Debian8.1 DVD ppc64el image


> 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 ?

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 \

Have a nice day :)


Reply to: