[Live-demo] ISO not isohybrid, lacks UEFI support
Brian M Hamlin
maplabs at light42.com
Tue Dec 6 07:45:39 PST 2016
Hi All
this line of build steps looks promising .. my own small investigations into the UEFI boot process raised more questions than answers, so I am grateful to see a new set of resources applied to the problem.
Specifically, I had not seen nor heard of, GNU xorriso, and I had not gone through Ticket #1761 in detail.
great news, and I will make time to test a bit soon
best from Berkeley, California
--Brian
On Tue, 6 Dec 2016 20:55:17 +1100, Cameron Shorter wrote:
Sounds promising Ben.
Looks like size won't be an issue with what you are proposing.
I'd be interested to hear if Brian has any comments. Brian has burned a
lot of USBs for prior conferences and might have some feedback on things
to look out for.
Cheers, Cameron
On 6/12/2016 3:54 PM, Ben Caradoc-Davies wrote:
> Cameron,
>
> in my first test, isohybrid and UEFI support increases the size of the
> ISO image by only 411648 bytes.
>
> Kind regards,
> Ben.
On 6/12/2016 4:08 PM, Ben Caradoc-Davies wrote:
> Angelos,
>
> I think I have a working solution:
> https://github.com/OSGeo/OSGeoLive/pull/142
>
> Not yet tested on physical hardware. The ISO should now work after
> being written to a raw thumb drive with dd, just like the official
> Ubuntu and Lubuntu ISO images.
>
> All of these boot in QEMU:
>
> QEMU test as "cdrom":
> $ qemu-system-x86_64 -enable-kvm -m 2048 -cdrom
> osgeo-live-nightly-build6-amd64-ab426ef.iso
>
> QEMU test as MBR boot thumb drive (which boot as first hard disk):
> $ qemu-system-x86_64 -enable-kvm -m 2048 -hda
> osgeo-live-nightly-build6-amd64-ab426ef.iso ^C
>
> QEMU test as UEFI boot thumb drive (OVMF Tianocore UEFI BIOS):
> $ qemu-system-x86_64 -enable-kvm -m 2048 -bios /usr/share/ovmf/OVMF.fd
> -hda osgeo-live-nightly-build6-amd64-ab426ef.iso
>
> Boot equipment looks good to me:
>
> $ xorriso -indev osgeo-live-nightly-build6-amd64-ab426ef.iso
> -report_el_torito plain -report_system_area plain
> xorriso 1.4.6 : RockRidge filesystem manipulator, libburnia project.
>
> xorriso : NOTE : Loading ISO image tree from LBA 0
> xorriso : UPDATE : 502 nodes read in 1 seconds
> xorriso : NOTE : Detected El-Torito boot information which currently
> is set to be discarded
> Drive current: -indev 'osgeo-live-nightly-build6-amd64-ab426ef.iso'
> Media current: stdio file, overwriteable
> Media status : is written , is appendable
> Boot record : El Torito , MBR isohybrid cyl-align-off GPT
> Media summary: 1 session, 2069246 data blocks, 4041m data, 7489m free
> Volume id : 'OSGEOLIVE10'
> El Torito catalog : 164 1
> El Torito cat path : /isolinux/boot.cat
> El Torito images : N Pltf B Emul Ld_seg Hdpt Ldsiz LBA
> El Torito boot img : 1 BIOS y none 0x0000 0x00 4 165
> El Torito boot img : 2 UEFI y none 0x0000 0x00 4736 185
> El Torito img path : 1 /isolinux/isolinux.bin
> El Torito img opts : 1 boot-info-table isohybrid-suitable
> El Torito img path : 2 /boot/grub/efi.img
> System area options: 0x00000202
> System area summary: MBR isohybrid cyl-align-off GPT
> ISO image size/512 : 8276984
> Partition offset : 0
> MBR heads per cyl : 0
> MBR secs per head : 0
> MBR partition table: N Status Type Start Blocks
> MBR partition : 1 0x80 0x00 0 8278016
> MBR partition : 2 0x00 0xef 740 4736
> MBR partition path : 2 /boot/grub/efi.img
> GPT : N Info
> GPT disk GUID : c22a598de644cf4ababebbce02526bc1
> GPT entry array : 2 128 overlapping
> GPT lba range : 34 8277982 8278015
> GPT partition name : 1
> 490053004f004800790062007200690064002000490053004f00
> GPT partname local : 1 ISOHybrid ISO
> GPT partition GUID : 1 ddfce2b743e69e439dd9fd1b0859474c
> GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7
> GPT partition flags: 1 0x0000000000000000
> GPT start and size : 1 0 8276984
> GPT partition name : 2 490053004f00480079006200720069006400
> GPT partname local : 2 ISOHybrid
> GPT partition GUID : 2 fd17fc2ba0182c4490c1d617372125de
> GPT type GUID : 2 a2a0d0ebe5b9334487c068b6b72699c7
> GPT partition flags: 2 0x0000000000000000
> GPT start and size : 2 740 4736
> GPT partition path : 2 /boot/grub/efi.img
>
> Kind regards,
> Ben.
>
>
> On 06/12/16 07:40, Ben Caradoc-Davies wrote:
>> Angelos,
>>
>> I will see if I can get genisoimage+isohybrid to work. If not, I will
>> try xorriso, which seems to be under more active development.
>>
>> Kind regards,
>> Ben.
>>
>> On 04/12/16 23:22, Angelos Tzotsos wrote:
>>> Hi Ben,
>>>
>>> It is a known fact that Ubuntu has switched its build process closer to
>>> the Debian iso build process.
>>> I contacted several Ubuntu developers (specifically those who are
>>> responsible for the iso creation) during our previous dev cycle.
>>> Here is
>>> the information gathered back then:
>>> https://trac.osgeo.org/osgeo/ticket/1761
>>>
>>> We decided not to switch our build method since this would require too
>>> much effort.
>>>
>>> Now what you propose is something that sounds easier than switching to
>>> the new Ubuntu build process.
>>> Can you please make a pull request to include those extra isohybrid
>>> commands?
>>>
>>> Cheers,
>>> Angelos
>>>
>>> On 12/02/2016 01:16 AM, Ben Caradoc-Davies wrote:
>>>> The current ISO image osgeo-live-10.0-amd64.iso is not isohybrid, and
>>>> lacks UEFI support. As far as I know, all current official Ubuntu live
>>>> images have both. Shipping isohybrid images simplifies USB thumb drive
>>>> creation because the ISO can then be written directly to a raw device
>>>> with dd without needing any other processing, not to mention
>>>> consistency with Ubuntu.
>>>>
>>>> Does anyone object to changing the ISO build process to make isohybrid
>>>> images with UEFI support? This should a matter of a few additional
>>>> xorriso arguments.
>>>>
>>>>
>>>> The current ISO is suitable for MBR isohybrid but lacks UEFI support:
>>>>
>>>> $ isohybrid -u osgeo-live-10.0-amd64.iso
>>>> isohybrid: osgeo-live-10.0-amd64.iso: unable to find efi image
>>>>
>>>>
>>>> The existing boot equipment of the ISO contains only MBR support:
>>>>
>>>> $ xorriso -indev osgeo-live-10.0-amd64.iso -report_el_torito plain
>>>> -report_system_area plain
>>>> xorriso 1.4.6 : RockRidge filesystem manipulator, libburnia project.
>>>>
>>>> xorriso : NOTE : Loading ISO image tree from LBA 0
>>>> xorriso : UPDATE : 502 nodes read in 1 seconds
>>>> xorriso : NOTE : Detected El-Torito boot information which currently
>>>> is set to be discarded
>>>> Drive current: -indev 'osgeo-live-10.0-amd64.iso'
>>>> Media current: stdio file, overwriteable
>>>> Media status : is written , is appendable
>>>> Boot record : El Torito
>>>> Media summary: 1 session, 2062470 data blocks, 4028m data, 8267m free
>>>> Volume id : 'OSGEOLIVE10'
>>>> El Torito catalog : 164 1
>>>> El Torito cat path : /isolinux/boot.cat
>>>> El Torito images : N Pltf B Emul Ld_seg Hdpt
>>>> Ldsiz LBA
>>>> El Torito boot img : 1 BIOS y none 0x0000 0x00 4 165
>>>> El Torito img path : 1 /isolinux/isolinux.bin
>>>> El Torito img opts : 1 boot-info-table isohybrid-suitable
>>>> xorriso : NOTE : No System Area was loaded
>>>>
>>>>
>>>> Kind regards,
>>>>
>>>
>>>
>>
>
--
Cameron Shorter
M +61 419 142 254
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