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Re: Debian installation issues


Dan Ritter wrote:
> https://www.microsoft.com/en-us/software-download/windows10ISO/

The site creates a download link which is valid for one day.
4+ GB. Only good that my phone provider forced me on a 50 Mbit/s
line last year. 

  $ xorriso -indev Win10_1607_English_x64.iso -report_el_torito plain -report_system_area plain
  Volume id    : 'CCSA_X64FRE_EN-US_DV5'
  El Torito catalog  : 22  1
  El Torito images   :   N  Pltf  B   Emul  Ld_seg  Hdpt  Ldsiz         LBA
  El Torito boot img :   1  BIOS  y   none  0x0000  0x00      8         539
  El Torito boot img :   2  UEFI  y   none  0x0000  0x00      1         541
  El Torito img blks :   1  2
  El Torito img blks :   2  2138320
  xorriso : NOTE : No System Area was loaded

No MBR and no partition tables to see.
So the ISO is only prepared for booting from CD, DVD, or BD media.
Not for hard disk or USB stick.

Since we are at it, let's have a look at the filesytems:

There is only one data file in the ISO 9660. Its content says
  This disc contains a "UDF" file system and requires an operating system
  that supports the ISO-13346 "UDF" file system specification.

So i mount it
  # mount -t udf -o loop Win10_1607_English_x64.iso /mnt/iso
and then can see lots of files underneath /mnt/iso.
  $ du -s /mnt/iso
  4273306 /mnt/iso

The content of the EFI System partition is similarly meager as in
a Debian ISO.
  # mount -t vfat -o loop,offset=1107968 Win10_1607_English_x64.iso /mnt/fat
The offset number 1107968 was computed from UEFI boot image LBA 541
multiplied by DVD block size 2048 bytes.
  $ find /mnt/fat -exec ls -ld '{}' ';'
  drwxr-xr-x 3 root root 7168 Jan  1  1970 /mnt/fat
  drwxr-xr-x 3 root root 512 Jul 15  2016 /mnt/fat/EFI
  drwxr-xr-x 2 root root 512 Jul 15  2016 /mnt/fat/EFI/BOOT
  -rwxr-xr-x 1 root root 869216 Jul 15  2016 /mnt/fat/EFI/BOOT/BOOTX64.EFI

Have a nice day :)