Re: Grub 2 how boot .iso with memdisk?

[Andrei Borzenkov]

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?