MCT boot usb

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  1. Posts : 17,349
    Windows 11 Pro
       #11

    Well, if @Bree is like me, the ISO files we get with the media creation tool has an install.esd file that is smaller than 4 gb.
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  2. Posts : 834
    Windows 10 Pro 64bit 21H2 19044.1766
       #12

    NavyLCDR said:
    Well, if @Bree is like me, the ISO files we get with the media creation tool has an install.esd file that is smaller than 4 gb.
    Odd, the 2004 iso I downloaded from Rufus which I believe comes from Window's servers had an install.wim larger than 4gb.


    - update -

    I see now why it's different.
    The Rufus version is no doubt a multi-edition iso where as when you run the MediaCreationTool2004.exe and before the iso gets downloaded it zeros in on your specifications creating the smaller esd.


    My confusion - my mistake..
    Last edited by Farvatten; 20 Jul 2020 at 22:02.
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  3. Posts : 17,349
    Windows 11 Pro
       #13

    Farvatten said:
    I see now why it's different.

    The Rufus version is no doubt a multi-edition iso where as when you run the MediaCreationTool2004.exe and before the iso gets downloaded it zeros in on your specifications creating the smaller esd.

    My confusion - my mistake..
    These are the editions included in the ISO file created by the Media Creation Tool:

    Code:
    F:\sources>dism /get-wiminfo /wimfile:install.esd
    
    Deployment Image Servicing and Management tool
    Version: 10.0.19041.1
    
    Details for image : install.esd
    
    Index : 1
    Name : Windows 10 Home
    Description : Windows 10 Home
    Size : 14,212,376,596 bytes
    
    Index : 2
    Name : Windows 10 Home N
    Description : Windows 10 Home N
    Size : 13,441,677,475 bytes
    
    Index : 3
    Name : Windows 10 Home Single Language
    Description : Windows 10 Home Single Language
    Size : 14,211,972,277 bytes
    
    Index : 4
    Name : Windows 10 Education
    Description : Windows 10 Education
    Size : 14,450,251,000 bytes
    
    Index : 5
    Name : Windows 10 Education N
    Description : Windows 10 Education N
    Size : 13,693,633,242 bytes
    
    Index : 6
    Name : Windows 10 Pro
    Description : Windows 10 Pro
    Size : 14,450,428,963 bytes
    
    Index : 7
    Name : Windows 10 Pro N
    Description : Windows 10 Pro N
    Size : 13,691,468,430 bytes
    
    The operation completed successfully.
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  4. Posts : 834
    Windows 10 Pro 64bit 21H2 19044.1766
       #14

    NavyLCDR said:
    These are the editions included in the ISO file created by the Media Creation Tool:
    Well I'm certainly striking out here tonight. Thanks for this info. I wonder why Rufus wants to send this larger install.wim then?

    I suppose there's some advantage over the esd?
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  5. Posts : 25,047
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #15

    Farvatten said:
    Well I'm certainly striking out here tonight. Thanks for this info. I wonder why Rufus wants to send this larger install.wim then?
    I suppose there's some advantage over the esd?

    It's not up to Rufus, you're just getting a link to download the ISO direct from Microsoft. It is Microsoft's decision to put the larger install.wim in all their direct download ISOs.

    The one for 2004 is larger than 4GB partly because .esd uses more compression, but mainly because the 2004 install.wim contains more editions than the install.esd.

    NavyLCDR said:
    Windows 10 ISO file downloaded without the MCT contains 4 more versions: Windows 10 Pro Education, Windows 10 Pro Education N, Windows 10 Pro Workstation and Windows 10 Pro Workstation N. I know with the Media Creation Tool, Microsoft is trying to keep the install.esd file under 4 GB so it will still fit in a FAT32 partition, maybe they couldn't do that with the 4 extra editions included.
    Windows 10 2004 Media Creation Tool


    As for any advantage of a .wim over a .esd, for install purposes they are interchangeable, but for customising an image you need to start with an install.wim.

    Kari said:
    This method requires Windows image in a WIM file. An ISO or USB flash drive created with Windows Media Creation Tool contains Windows image in install.esd file instead of install.wim, and therefore it cannot be used.
    Apply unattended answer file to Windows 10 install media
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  6. Posts : 834
    Windows 10 Pro 64bit 21H2 19044.1766
       #16

    Bree said:
    As for any advantage of a .wim over a .esd, for install purposes they are interchangeable, but for customising an image you need to start with an install.wim.
    Again thanks.

    I always appreciate the time you take to clear things up and can see now with these straight forward diskpart steps that @NavyLCDR documented along with this knowledge of a FAT32 compatible MCT iso that this really is a smart way to go.
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  7. Posts : 17,349
    Windows 11 Pro
       #17

    The reason you want the USB flash drive to be FAT32 is to maintain compatibility with most UEFI computers that will only boot from FAT partitions in UEFI mode. If you have no need for that specific compatibility, the flash drive can be NTFS using the same manual creation process. One line gets changed to "format fs=NTFS quick".
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  8. Posts : 25,047
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #18

    ...and the reason I want Fat32 is that some of my collection of laptops are Legacy BIOS machines
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  9. Posts : 17,349
    Windows 11 Pro
       #19

    Legacy BIOS will boot from NTFS no problem. In fact, the default System Partition Windows creates on a legacy BIOS install is NTFS.
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  10. Posts : 4,224
    Windows 10
       #20

    I recommend the GitHub project Ventoy. It creates a two-partition bootable USB flash drive: P1 is a 32-MB bootable FAT32 partition that works with both MBR and GPT/EFI boots. P2 is as big as the rest of the USB flash drive, is formatted exFAT and can handle files larger than 4 GB. The program is genius: after booting, it provides a menu of all ISOs in P2 (named Ventoy) and then mounts the chosen ISO as the boot environment. Works like a champ, with Windows and non-Windows OSes. Highly recommended.
    --Ed--

    PS: @Kari and I have written about this tool multiple times for Win10.Guru. See this Site Search for pointers to those specific items.
    Last edited by EdTittel; 21 Jul 2020 at 10:15. Reason: Add user link, fix URL
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