[Top][All Lists]

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

Re: xorriso and EFI boot images

From: Thomas Schmitt
Subject: Re: xorriso and EFI boot images
Date: Fri, 23 Apr 2010 00:30:51 +0200


Seth Goldberg wrote:
> BTW, See Fedora's genisoimage for a good example of how they do it.

Thanks for the hint.
Ahum ...
  -eltorito-alt-boot -e images/efiboot.img -no-emul-boot

In man mkisofs of 2.01.01a64 and in
i see
but not
So the latter is probably a Fedora extension to

The description is very similar to what i
implemented as --efi-boot.
But -no-emul-boot is implied by --efi-boot and
we are not in sync with the size of sectors:
The web page talks of 2048 where i use 512.

As far as El Torito 1.0 is concerned, the case is
clear: Figure 5 - Section Entry talks of
"virtual/emulated sectors". Paragraph 1.5 defines
a Virtual Sector as [0x]200 bytes. A CD sector is
But is EFI following this convention ?

Vladimir ? 512 or 2048 ?

Since -eltorito-alt-boot is part of original
mkisofs i will use the same option for my
It will be implicit with --efi-boot.

I will have to ponder about implementing
option -e .
Anybody has a man page where it is described ?

> For maximum compatibility, the BIOS entry (platform id 0) should be first.

Well, it seems that option -eltorito-alt-boot
gives the user the freedom to do it different.
Since it is easy to do it right, i am in doubt
whether it is worth to force the user.

Have a nice day :)


reply via email to

[Prev in Thread] Current Thread [Next in Thread]