Re: Adding partition(s) to a Debian install pendrive

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

Pascal Hambourg wrote:
> Any _decent_ BIOS should ignore the partition table. It is none of its
> business.

Yep. But there seems to be the tendency to install MBR code which
extents the BIOS by looking at the partition table and hop onto the
x86 code at the start of the partition marked by the "Boot" flag.
So there was a risk that some well meant default mechanism decided
to replace the ISOLINUX x86 code by such chain loader code.


> So unless the partitioning tool is badly broken

Their disciples accuse each other of that sin.

A Debian isohybrid MBR together with invalid GPT and a valid APM
(Apple Partition Map) is quite far from looking sane.
These features are fishing for boot firmware, not for the applause of
partition editors. That's why they are so much borderline.

A partition editor could come to the idea to make the GPT valid
by patching in its standard Protective MBR template.
It could come to the idea to correct the insane size value or
the other fields of the APM Block0, which are actually x86 instructions
to let the CPU hop on the ISOLINUX El Torito boot image.

Well, with fdisk "n" it seems to be ok, currently.


Have a nice day :)

Thomas