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  1.    16 Mar 2017 #1
    Join Date : Jun 2015
    MD
    Posts : 592
    10 Pro

    Bootable USB


    I keep reading that to make a bootable flash drive for an ISO one needs either Rufus or the Windows tool.
    I told a mod that I swap the files within the ISO to the USB and it boots and he agreed that this works. I looked within the files and boot was there. When I insert the USB and boot from it, it installs the OS.
    Why does so many articles say to prepare it to boot with the tool or Rufus when simply dragging will do??
      My ComputerSystem Spec
  2.    16 Mar 2017 #2
    Join Date : Feb 2014
    Posts : 9,361
    Windows 10 Professional

    Quote Originally Posted by maranna View Post
    I keep reading that to make a bootable flash drive for an ISO one needs either Rufus or the Windows tool.
    I told a mod that I swap the files within the ISO to the USB and it boots and he agreed that this works. I looked within the files and boot was there. When I insert the USB and boot from it, it installs the OS.
    Why does so many articles say to prepare it to boot with the tool or Rufus when simply dragging will do??
    Probably because, prior to Windows 8, you couldn't mount an ISO file natively.
    Some 'cheapie' usb sticks don't work, though.
      My ComputersSystem Spec
  3.    16 Mar 2017 #3
    Join Date : Jun 2015
    MD
    Posts : 592
    10 Pro
    Thread Starter

    Thanks - that's it in a nutshell. yes, I get a good stick so there is less chance of failure.
    Windows burner is really improving so I don't know why so many want 3rd party. To each his own though.
      My ComputerSystem Spec
  4.    17 Mar 2017 #4
    Join Date : Jul 2014
    Serbia
    Posts : 10,439
    W10 Insider + Linux

    Simple, less "work" using Rufus and such applications.
      My ComputersSystem Spec
  5.    17 Mar 2017 #5
    Join Date : Jul 2015
    Posts : 9,394
    Windows 10 Pro

    It is very simple to prepare a bootable USB. To be compatible with both legacy BIOS and UEFI firmware there are only two requirements - the USB flash drive be formatted FAT32, and the FAT32 partition on it be marked as active. Then all you have to do is copy all the files from a bootable ISO file to it.

    FAT32 is the requirement for UEFI firmware. Partition marked as active is the requirement for legacy BIOS.
      My ComputerSystem Spec
  6.    17 Mar 2017 #6
    Join Date : Jul 2014
    Serbia
    Posts : 10,439
    W10 Insider + Linux

    Quote Originally Posted by NavyLCDR View Post
    It is very simple to prepare a bootable USB. To be compatible with both legacy BIOS and UEFI firmware there are only two requirements - the USB flash drive be formatted FAT32, and the FAT32 partition on it be marked as active. Then all you have to do is copy all the files from a bootable ISO file to it.

    FAT32 is the requirement for UEFI firmware. Partition marked as active is the requirement for legacy BIOS.
    But programs like Rufus can make choices for you without the need to know all that. I just give him a job to do and it does it in the background while I'm free to do other things. MS USB boot maker also downloads files.
      My ComputersSystem Spec
  7.    17 Mar 2017 #7
    Join Date : Jul 2015
    Posts : 9,394
    Windows 10 Pro

    There have been so many threads where people have complained about a USB flash drive not booting in their computer and I have asked, What did you use to make it? The most common answer is Rufus because they picked the wrong settings. For making a bootable USB flash drive of anything Windows based, I cannot recommend Rufus because it is much easier to tell someone, FAT32 - partition marked as active, that's all you need.
      My ComputerSystem Spec
  8.    17 Mar 2017 #8
    Join Date : Jun 2015
    MD
    Posts : 592
    10 Pro
    Thread Starter

    Quote Originally Posted by NavyLCDR View Post
    There have been so many threads where people have complained about a USB flash drive not booting in their computer and I have asked, What did you use to make it? The most common answer is Rufus because they picked the wrong settings. For making a bootable USB flash drive of anything Windows based, I cannot recommend Rufus because it is much easier to tell someone, FAT32 - partition marked as active, that's all you need.
    >>I sometimes think instead of asking experts about simplicity you should ask a low level user like me because we are the acid test as to relative simplicity.
    I was confused by Rufus.
    How confusing can it be to drag some files to a drive. I am using FAT 32 as Navy instructed me, and only Windows, without failure. It seems Windows 10 is progressing, not regressing, and not needing 3rd party as much.
    KIS.
      My ComputerSystem Spec
  9.    17 Mar 2017 #9
    Join Date : Jun 2015
    Posts : 1,908
    Windows 3.1 to Windows 10

    I have never found a reason to use Rufus...
    Fat32 format is all you need...

    Here was the main reason for Rufus and UEFI >
    Rufus tricks windows into thinking a NTFS formatted USB is Fat32..

    Fat32 has a 4GB file limitation, so the install.wim can not be larger then that...
    NTFS does not have that limitation..
    Setup media will not recognize a split wim > install.swm(s)
    so those using custom wim's are limited by fat32 and Windows Setup...

    The way around all that is use windows recovery to install the split wim's using Fat32

    I will also Note: the average user here, does not use custom wim's or install.wim's larger then 4GB
    So again no need for Rufus
      My ComputerSystem Spec
  10.    17 Mar 2017 #10
    Join Date : Jun 2015
    MD
    Posts : 592
    10 Pro
    Thread Starter

    @Kyhi
    Does that mean that my .WIM file cannot utilize all of DISM?
    I am way over my head here but I downloaded the .Wim ISO form tech bench when it was available. I then burned it to DVD so I have that at least. I then copied the files to a flash drive.
    So if I want to use all of DISM's commands, I can use the DVD but not the stick?
      My ComputerSystem Spec

 
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