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  1.    28 May 2017 #1
    Join Date : Sep 2016
    Posts : 165
    Windows 10 Pro 64 bit

    Windows 10 ISO: file system question


    Hi,

    I don't want and I never used the "media creation tool".

    I Always donwload the ISO and then I usually put it in a dvd and in some pendrives.

    But, I Always have some doubts that I want to clarify forever, if you can help me.

    We have a WINDOWS 10.ISO (latest version).

    If I am correct:

    For LEGACY bios just COPY the ISO contents into the pendrive using NFTS and MBR.

    For SECURE BOOT and UEFI bios just COPY the ISO into the pendrive using GPT and FAT32.

    Said so, a program such RUFUS should be useless.

    Please, tell me if I am right or correct me. I want to understand that forever.

    PS: if someone use the Media Creation Tool, how this tool knows if the target is LEGACY or UEFI??? What kind of FS will use the tool itself??? It will pass the secure boot too?
      My ComputerSystem Spec
  2.    28 May 2017 #2
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,451
    windows 10

    A ISO is basically a disk image and must be written to the device by the correct software copying the contents isn't the correct way of doing it as it needs to write the correct boot sector
      My ComputerSystem Spec
  3.    28 May 2017 #3
    Join Date : Sep 2016
    Posts : 165
    Windows 10 Pro 64 bit
    Thread Starter

    In this forum, in the last, someone said me that a copy (for gpt uefi fat32 as i remember) was enough.

    I am not sure but once it worked without any tools (just copy).

    Maybe a Rufus is needed only for ntfs mbr legacy?

    I'd like to understand more of this just the have a precise idea. Also need to understand how the WMC tool works.
      My ComputerSystem Spec
  4.    28 May 2017 #4
    Join Date : Dec 2015
    Posts : 5,879
    Windows10

    Quote Originally Posted by Pipppero2007 View Post
    Hi,

    I don't want and I never used the "media creation tool".

    I Always donwload the ISO and then I usually put it in a dvd and in some pendrives.

    But, I Always have some doubts that I want to clarify forever, if you can help me.

    We have a WINDOWS 10.ISO (latest version).

    If I am correct:

    For LEGACY bios just COPY the ISO contents into the pendrive using NFTS and MBR.

    For SECURE BOOT and UEFI bios just COPY the ISO into the pendrive using GPT and FAT32.

    Said so, a program such RUFUS should be useless.

    Please, tell me if I am right or correct me. I want to understand that forever.

    PS: if someone use the Media Creation Tool, how this tool knows if the target is LEGACY or UEFI??? What kind of FS will use the tool itself??? It will pass the secure boot too?
    1) use fat32 in all cases.

    2) the media creation tool creates a usb drive suitable for either install. It does it automatically - if drive is mbr formatted, it installs as legacy bios, if gpt - uefi. MCT really is easiest way to do it without thinking.

    3) it works with secure boot on but in a hyper-v vm, you may need to turn it off.
      My ComputerSystem Spec
  5.    28 May 2017 #5
    Join Date : Jul 2015
    Posts : 9,360
    Windows 10 Pro

    Format the USB flash drive as FAT32. Mark the FAT32 partition on the USB flash drive as Active. Copy the files in the ISO file to the USB flash drive. It will boot in both Legacy BIOS and UEFI, secure boot enabled or not. The Media Creation Tool does not need to know if the target is UEFI or legacy BIOS because an Active FAT32 partition is compatible with both.

    There is no need for RUFUS. The commands in diskpart are:

    diskpart
    list disk
    select disk # <- replace # with the disk number of the usb flash drive
    clean <- this will erase the flash drive
    create part pri
    format fs=fat32 quick
    active
    exit
    exit
      My ComputerSystem Spec
  6.    28 May 2017 #6
    Join Date : Dec 2015
    Posts : 5,879
    Windows10

    Quote Originally Posted by NavyLCDR View Post
    Format the USB flash drive as FAT32. Mark the FAT32 partition on the USB flash drive as Active. Copy the files in the ISO file to the USB flash drive. It will boot in both Legacy BIOS and UEFI, secure boot enabled or not. The Media Creation Tool does not need to know if the target is UEFI or legacy BIOS because an Active FAT32 partition is compatible with both.

    There is no need for RUFUS. The commands in diskpart are:

    diskpart
    list disk
    select disk # <- replace # with the disk number of the usb flash drive
    clean <- this will erase the flash drive
    create part pri
    format fs=fat32 quick
    active
    exit
    exit
    I always use command assign after format as that forces a mount point for a drive letter. I have found some sytems or drives (no idea which) do not automatically assign a drive letter. Should not happen but something causes that now and then. Never had issue since applying assign command.
      My ComputerSystem Spec
  7.    29 May 2017 #7
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,411
    Windows 10 IoT

    I also do assign, active etc. It's just habit/routine for me now. I hardly ever use the MCT, as I usually use my MSDN ISO's and just use diskpart.
      My ComputerSystem Spec
  8.    29 May 2017 #8
    Join Date : Dec 2015
    Posts : 5,879
    Windows10

    Quote Originally Posted by alphanumeric View Post
    I also do assign, active etc. It's just habit/routine for me now. I hardly ever use the MCT, as I usually use my MSDN ISO's and just use diskpart.
    Actually I rarely use active as I always use UEFI where it is not needed, but as belts-and-braces, fine.
      My ComputerSystem Spec
  9.    29 May 2017 #9
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,411
    Windows 10 IoT

    Quote Originally Posted by cereberus View Post
    Actually I rarely use active as I always use UEFI where it is not needed, but as belts-and-braces, fine.
    I have a mix of both, my older desktop PC's are legacy and my newer laptops are UEFI. My ASUS laptop will actually do a UEFI install from an NTFS formatted thumb drive. It's just easier to do all my thumb drives the same way and not worry about them working or not working.
      My ComputerSystem Spec
  10.    11 Jun 2017 #10
    Join Date : Sep 2016
    Posts : 165
    Windows 10 Pro 64 bit
    Thread Starter

    Quote Originally Posted by NavyLCDR View Post
    Format the USB flash drive as FAT32. Mark the FAT32 partition on the USB flash drive as Active. There is no need for RUFUS. The commands in diskpart are:

    diskpart
    list disk
    select disk # <- replace # with the disk number of the usb flash drive
    clean <- this will erase the flash drive
    create part pri
    format fs=fat32 quick
    active
    exit
    exit
    Quote Originally Posted by cereberus View Post
    I always use command assign after format as that forces a mount point for a drive letter. I have found some sytems or drives (no idea which) do not automatically assign a drive letter. Should not happen but something causes that now and then. Never had issue since applying assign command.
    I didn't understand this reply to NavyLCDR.

    If I am correct, basically, you tell me that:

    1) ISO to be extracted
    2) format USB as FAT32
    3) copy ISO extracted to USB
    4) mark USB as active

    Those commands I can do with diskpart but also with disk managment of Windows or 3rd party software of partitions (is right?) for people that don't want to use DOS interface.

    Assuming what I wrote above is correct, I didn't understand about the "command assign" after format.
      My ComputerSystem Spec

 
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