iso2flash img

[Da Rock]

On 03/23/12 04:46, Thomas Schmitt wrote:
> Hi,
>
>>> The trick is called "isohybrid".
> Luigi Rizzo<rizzo at iet.unipi.it>  wrote:
>> interesting. It does work for me indeed.
> So why not for Da Rock ?
Starting to feel left out here :)

I tried with your flags to dd (as opposed to those on Ubuntu - bs=1m - 
not that I thought it would make much diff), and it got as far as the 
last time. It shows isolinux 4.04, blah blah, and a blinking cursor. It 
goes no further than that, which I why I commented that it seemed an 
unlikely solution.

The system is an Acer AspireOne Netbook D255. I'm using an i386 image 
because its only an Atom.

I did test a amd64 system and it worked though... hmmm. I wonder if they 
mixed up their images? That'd be a funny cock-up :D
>
>
>> And it might be a nice trick for our images too, so we don't
>> have to build a memstick and an ISO image...
> I would be happy to help with that.
> I am the developer of program xorriso which in the role of mkisofs
> has composed that Ubuntu image. My knowlege is only about pointing BIOS
> to the boot loader start programs, not about those boot systems themselves.
>
> A while ago i exercised the most simple case of
>    http://wiki.freebsd.org/AvgLiveCD
> with the mkisofs emulation of xorriso. It booted.
>
> An MBR can be inserted easily by mkisofs option -G.
> isohybrid demands to patch that MBR with the LBA of the boot image
> and to set up the DOS partition table. GRUB2 demands only to set up
> the partition table. (Special xorrisofs options get employed.)
>
> What would a FreeBSD bootloader MBR need to know about the data in
> the ISO image to start up and handle it like a read-only hard disk ?
> Do programs of the first boot stages need to know their own LBA in
> the image resp. partition ?
>
> The El Torito and MBR equipment of GRUB2 can provide the same functionality
> as ISOLINUX with isohybrid. GRUB2 script grub-mkrescue demonstrates this.
> I understand Debian GNU/kFreeBSD boots via El Torito and GRUB2. But it
> makes no use of the opportunity to have an MBR too.
> I boot my own FreeBSD 8-STABLE from hard disk via MBR, GRUB2 and a
> chainloaded FreeBSD boot loader.
>
>
> Have a nice day :)
>
> Thomas
>
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