Re: Booting from a bootable ISO

[Arbiel (gmx)]

Hi Rusi

Thank you for this piece of  information.

I understand "apt-get grub-imageboot" to create the 
/etc/grub.d/60_grub-imageboot script, which inserts the menuentries in 
grub.cfg. So the <Insert UUID> should be set correctly, and not to be 
modified by the user.

Am I correct ?

Le 07/04/2014 16:25, Rustom Mody a écrit :
> On Mon, Apr 7, 2014 at 7:39 PM, Arbiel (gmx) <address@hidden> wrote:
> > Hi Rusi
> >
> > Can you please publish the menuentries you found in your grub.cfg file ?
> >
> > Arbiel
>
> Hi Arbiel
> See below
>
> Regards
> Rusi
>
> [Any reason for private mail rather than mailing list?]

No reason : it was a misuse of my e-mail client

> Change the <Insert UUID> to yours or (my preference) switch to labels
>
> ### BEGIN /etc/grub.d/60_grub-imageboot ###
> menuentry "Bootable ISO Image: Barracuda12-ALL-CC49" {
>          insmod part_msdos
>          insmod ext2
>          set root='hd0,msdos5'
>          if [ x$feature_platform_search_hint = xy ]; then
>            search --no-floppy --fs-uuid --set=root
> --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5
> --hint-baremetal=ahci0,msdos5 <Insert UUID>
>          else
>            search --no-floppy --fs-uuid --set=root <Insert UUID>
>          fi
>          linux16 /boot/memdisk iso
>          initrd16 /boot/images/Barracuda12-ALL-CC49.iso
> }
> menuentry "Bootable ISO Image: RIPLinuX-13.7" {
>          insmod part_msdos
>          insmod ext2
>          set root='hd0,msdos5'
>          if [ x$feature_platform_search_hint = xy ]; then
>            search --no-floppy --fs-uuid --set=root
> --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5
> --hint-baremetal=ahci0,msdos5  <Insert UUID>
>          else
>            search --no-floppy --fs-uuid --set=root <Insert UUID>
>          fi
>          linux16 /boot/memdisk iso
>          initrd16 /boot/images/RIPLinuX-13.7.iso
> }
> ### END /etc/grub.d/60_grub-imageboot ###
>
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> > Le 07/04/2014 06:35, Rustom Mody a écrit :
> > > On Mon, Apr 7, 2014 at 12:18 AM, Andrey Borzenkov <address@hidden
> > > <mailto:address@hidden>> wrote:
> > >
> > >      В Sun, 6 Apr 2014 23:09:40 +0530
> > >      Rustom Mody <address@hidden <mailto:address@hidden>>
> > >
> > >      пишет:
> > >
> > >       > On Sun, Apr 6, 2014 at 10:34 PM, Andrey Borzenkov
> > >      <address@hidden <mailto:address@hidden>>wrote:
> > >
> > >       >
> > >       > > В Sun, 6 Apr 2014 22:10:25 +0530
> > >       > > Rustom Mody <address@hidden
> > >      <mailto:address@hidden>> пишет:
> > >
> > >       > >
> > >       > > > Many people -- in particular hardware vendors -- are nowadays
> > >      supplying
> > >       > > > bootable ISO's.
> > >       > > > You have to
> > >       > > > 1. Download the ISO
> > >       > > > 2. Burn a CD
> > >       > > > 3. Boot with it
> > >       > > > 4. Follow the instructions (to (re)flash the
> > >      motherboard/CP/Disk etc)
> > >       > > >
> > >       > > > Ive already been able to boot ubuntu from an iso on disk
> > >       > > > Next Ive done it with making a grub-bootable usb and
> > >      loop-mounting the
> > >       > > iso
> > >       > > > from there
> > >       > > >
> > >       > > > So now to boot from a general (ie non linux) bootable ISO?
> > >       > > >
> > >       > >
> > >       > > I do not think it is possible in general case. For a start,
> > > program
> > >       > > that would be started from ISO may need access to CD/DVD which is
> > >       > > possible only if system firmware (BIOS/EFI) actually see device.
> > >       > >
> > >       > >
> > >       > Sorry....
> > >       > Maybe I focused on the wrong aspect -- hardware flashing.
> > >       >
> > >       > So to correct that:
> > >       > 1. I believe that Isolinux can do this
> > >
> > >      You need resident driver providing emulated CD driver. grub does not
> > >      include one. For BIOS systems the easiest way is to use memdisk (which
> > >      is part of syslinux project indeed) which can be booted by grub. See
> > >      http://www.syslinux.org/wiki/index.php/MEMDISK
> > >
> > >
> > > Thanks!
> > >
> > > Just FYI (and anyone else stumbling on this thread). I did:
> > > apt-install grub-image-boot
> > > Added some iso images to /boot/images
> > > Updated grub
> > >
> > > Now I find these in grub menu
> > > And they seem to run (minimally at least)
> > >
> > > So now next question -- How safe is it?
> > > Sorry if the question sounds unreasonable :-) but it can be also put
> > > like this:
> > >
> > > Put an (freedos-based) iso on CD and boot machine
> > > vs
> > > Put iso in /boot/images and boot with grub and (Syslinux??) Memdisk
> > >
> > > How different are these running environments from the point-of-view of
> > > the running ISO?
> > >
> > > Thanks
> > > Rusi
> > >
> > >
> > > _______________________________________________
> > > Help-grub mailing list
> > > address@hidden
> > > https://lists.gnu.org/mailman/listinfo/help-grub