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Windows ISO customization, delete unwanted windows editions to reduce ISO size RRS feed

  • Question

  • Hi All,

    I have a Windows 2012 x64 ISO, and the size of the ISO is 5.7 GB and it has the following below editions

    1. Windows 2012 Standard edition

    2. Windows 2012 Standard Core Edition

    3. Windows 2012 Datacenter Edition

    4. Windows 2012 Datacenter Core Edition

    We are trying to build a custom ISO only with 1 edition and want to reduce the ISO size by removing the 2,3,4 editions mentioned in the above table

    We just want a simple "Windows 2012 Standard Edition ISO" size needs to be reduced to a great extent

    We are using Deployment Workbench where in certain drivers, packages, updates are being incorporated into the ISO and later trying to build an ISO from it.

    When we IMPORT the OS into the Deployment Share in the workbench we see 4 editions, each edition size is around 1GB.

    We deleted the 3 editions and built a ISO media out of it but found the ISO to be around 5GB again.

    Can anyone please suggest on how to delete the editions and build a customized ISO including only "Windows 2012 Standard Edition"

    Thank you,

    Rexton

    Friday, January 9, 2015 7:10 AM

Answers

  • No, you are assuming that the WIndows Server install.wim file contains 4 *SEPERATE* Operating Systems, and thay by removing the other 3, you will get a proportional decrease in size, that is a incorrect assumption. WIndows *.wim files can contain multiple streams, and the wim container is intelligent enough to *SHARE* files between them. so removing the other 3 streams may only give you a small decrease in overall wim file size, typically less than 10MB. Probably not what you are looking for.


    Keith Garner - Principal Consultant [owner] - http://DeploymentLive.com

    Friday, January 9, 2015 7:29 AM
    Moderator

All replies

  • No, you are assuming that the WIndows Server install.wim file contains 4 *SEPERATE* Operating Systems, and thay by removing the other 3, you will get a proportional decrease in size, that is a incorrect assumption. WIndows *.wim files can contain multiple streams, and the wim container is intelligent enough to *SHARE* files between them. so removing the other 3 streams may only give you a small decrease in overall wim file size, typically less than 10MB. Probably not what you are looking for.


    Keith Garner - Principal Consultant [owner] - http://DeploymentLive.com

    Friday, January 9, 2015 7:29 AM
    Moderator
  • Thank you Keith.

    We do upload customized ISO via HTTP shares to be accessed by our customers.

    We were looking to upload limited size or streamlined version of ISO so that it would be easy for the clients to download a smaller GB ISO file rather than downloading a 5GB ISO, that was the intention.

    install.wim itself is around 4.5+ GB file, is there any other way to reduce the install.wim file?

    Will DISM removing features help in reducing the ISO size, or can we remove any components that will help us get a smaller size OS ISO.

    Friday, January 9, 2015 8:24 AM
  • Windows 8 ISO images from MIcrosoft are all less than 4GB in size, once you start adding in other components to the system it will bloat above 4GB.

    Updating the images with the latest MSFT Patches will also increase the size, unfortunately there is no easy way to trim the excess files from the system after you perform an update.

    If you want to try removing streams from the WIM image, you can use the DISM.exe /Export-Image command to see what happens.

    https://keithga.wordpress.com/2014/10/29/offline-patching-with-help-from-mdt/

    http://deploymentbunny.com/2014/06/05/nice-to-know-get-rid-of-all-junk-before-sysprep-and-capture-when-creating-a-reference-image-in-mdt/


    Keith Garner - Principal Consultant [owner] - http://DeploymentLive.com

    Friday, January 9, 2015 5:16 PM
    Moderator