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Re: Grub 2 how boot .iso with memdisk?

From: Дмитрий Чепуровский
Subject: Re: Grub 2 how boot .iso with memdisk?
Date: Mon, 2 Nov 2015 15:35:10 +0300

Ok, I read that it could be done by using syslinux memdisk with grub.

In this case, I found I need to call linux16 memdisk and initrd16 to launch iso.

1. Does it works?
2. Where could I found syslinux memdisk?

2015-11-02 15:25 GMT+03:00 Andrei Borzenkov <address@hidden>:
> On Mon, Nov 2, 2015 at 3:05 PM, Дмитрий Чепуровский <address@hidden> wrote:
>> I'm making usb multiusb pendrive.
>> 1. I want to understand what is memdisk.mod, how could I use it.
> I already answered this.
>> 2. I want to boot iso (bootloader thart in iso file) from grub2
> GRUB does not support parsing El Torito boot catalog and accessing
> boot image ... at least to my knowledge. So sorry, this is probably
> not possible right now.
> Besides the problem is not as much reading CD boot block as emulating
> "real" CD for the code that would be launched. I do not say it is not
> possible, but so far nobody implemented this in GRUB.
>> 2015-11-02 14:44 GMT+03:00 Andrei Borzenkov <address@hidden>:
>>> On Mon, Nov 2, 2015 at 2:25 PM, Дмитрий Чепуровский <address@hidden> wrote:
>>>> I'm trying to boot iso file. I want to boot ubuntu 15.10 iso & Windows
>>>> 10 Install iso. I found in google, that it could be made in grub2
>>>> using memdisk.
>>> You are confused. memdisk in grub2 is not used to boot anything. It is
>>> still not clear what you are trying to do:
>>> - you try to pretend that system was booted from CD or DVD with
>>> content of this image
>>> - or -
>>> - you try to boot using some file inside this image
>>>> For test I'm trying to boot with memtest ubuntu-15.10-desktop-amd64.iso.
>>>> cfg test menuentery:
>>>> menuentry "Test1" {
>>>>     insmod memdisk
>>>>     initrd /iso/ubuntu-15.10-desktop-amd64.iso
>>>> }
>>>> When I tied to run this I got alloc magic is broken at 0xc7ed5060: c7e5c980
>>> This makes me believe you want to pretend you are booted from DVD ...
>>>> What I'm doing wrong. How can I do this?
>>> It is still not quite clear what you want to do; could you explain in
>>> more words?

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