Re: Grub 2 how boot .iso with memdisk?

[Andrei Borzenkov]

On Mon, Nov 2, 2015 at 3:35 PM, Дмитрий Чепуровский <address@hidden> wrote:
> 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?

Why you ask us and not syslinux folks? It's their software after all -
GRUB is just a messenger here :)

http://www.syslinux.org/wiki/index.php/MEMDISK#GRUB2

> 2. Where could I found syslinux memdisk?
>

The same site (surprise) also has Download link ...

> 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?