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<br><blockquote style="padding-left: 5px; margin-left: 5px; border-left: 2px solid rgb(0, 0, 255); margin-right: 0px;"><hr><b>From:</b> Richard Shaw [mailto:hobbes1069@gmail.com]<br><b>To:</b> Fedora community advisory board [mailto:advisory-board@lists.fedoraproject.org]<br><b>Sent:</b> Wed, 12 Jan 2011 22:26:22 +0000<br><b>Subject:</b> Re: Remaining issues for the multi desktop DVD<br><br>On Wed, Jan 12, 2011 at 3:36 PM, Jesse Keating <<a href="mailto:jkeating@redhat.com">jkeating@redhat.com</a>> wrote:<br>
> On 1/12/11 1:16 PM, David Riches wrote:<br>
>> Purely out of curiosity (and my involvement in multiboot-media-<br>
>> creator) any chance of specifics where the box would not boot from the<br>
>> cd with grub, but would when it was installed?<br>
>><br>
>> Our testing with mmc hasn't shown this behavior is all, so I would<br>
>> appreciate more info<br>
>><br>
>> Thanks in advance<br>
><br>
> Hrm, apparently my memory is failing me. Nobody else remembers doing<br>
> the grub on a CD test way back when, but they all seem to indicate that<br>
> it is a bad idea with grub(1), and grub2 is just too untested.<br>
<br>
I don't think chainloading an ISO from GRUB 1 is possible. I tried<br>
this with System Rescue CD with the ISO copied into /boot but because<br>
GRUB uses Interrupt 13h it can't be used for the virtual CD. I ended<br>
up having to copy the kernel/initrd and image from the CD and booting<br>
it the more traditional way.</blockquote>Correct, you cannot chainload the iso. Moreover you grab the important parts of the livecd (kernel,initrd, LiveOS/ ) and boot them<br><blockquote style="padding-left: 5px; margin-left: 5px; border-left: 2px solid rgb(0, 0, 255); margin-right: 0px;"><span></span><br>
<br>
My memory is a little hazy at this point but it's something like that.<br>
<br>
I'm not sure if GRUB2 has the same limitation.</blockquote>Kind of, grub2 can loopmount an ISO, but it doesn't really grok iso's in the way that you might expect. If you loopmount and boot a liveos, the system cannot escape the loopmount and gain access to the HDD, so liveinst becomes dead. A similar thing happens with the dvd images, except it happens earlier in the process.<br><br>The trick is to "steal" the kernel, initrd and boot them. in the case of the LiveOSes you then point the kernel root argument to the directory "LiveOS/" in a similar way that isolinux does on the actual release.<br><blockquote style="padding-left: 5px; margin-left: 5px; border-left: 2px solid rgb(0, 0, 255); margin-right: 0px;"><span></span><br>
<br>
Richard<br>
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