Question about disk cloning

Discussion in 'SSD and HDD storage' started by Robox1, Jan 28, 2020.

  1. Robox1

    Robox1 Member Guru

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    One thing is not clear to me:



    if the disk to be cloned is 500GB, the space occupied is 150GB, can a 250GB target disk be used?



    Will the result be a 250GB final drive with 150 occupied and 100GB free usable?
     
  2. anticupidon

    anticupidon Ancient Guru

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    Create a destination partition on the target drive same size or more as the source partition.
    Clone is partition to partition.
    The storage difference should apply basic math and give more or less the desired result.
    There a tons of cloning tools.
    Choose one.
     
  3. mbk1969

    mbk1969 Ancient Guru

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    That`s the question about features of cloning software - can it clone with resize or not. If yes then answer to your question is "yes".
     
  4. zipper

    zipper Maha Guru

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    I suppose the term clone does always mean identical sizes of source and destination. So I've in the past resized the source before cloning if the destination has insufficient space. Used Aomei, Macrium and Easeus; mostly Easeus.
     

  5. Robox1

    Robox1 Member Guru

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    I cloned with Macrium Reflect and if I start the cloned SSD (both by selecting it as a priority in the bios and by starting it alone connected) (I specify that it is a bios of an Asus P5GCMX MB so I don't think they are problems related to UEFI) it gives me as message at startup "Reboot and select proper boot device".
    I tried to select "mark as active partition" from disk management and now it gives me as message at startup "BOOTMGR is missing"
     
  6. zipper

    zipper Maha Guru

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  7. mbk1969

    mbk1969 Ancient Guru

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    Is the original disk created and formatted with UEFI? Or MBR?
     
  8. Astyanax

    Astyanax Ancient Guru

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    neither is better, they just serve a different requirement.

    UEFI isn't a format anyway.
     
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  9. AsiJu

    AsiJu Ancient Guru

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    Based on what you have posted, I assume you want to clone an OS installation from a source disk to a target disk?

    For this you need to clone the entire disk - not just C: drive - especially if OS is installed in UEFI mode (=GPT partition) because UEFI installation creates additional system and recovery partitions as well.
    The BOOTMGR missing error sounds like you cloned only C: drive.

    Not familiar with Macrium Reflect but I guess it also has a "Clone / Migrate OS" tool you can use.
    That should automatically clone all needed partitions and set the target disk as System / Active.

    "Clone Disk" should work the same but may need to be manually set as Active. The point remains: you need to clone the disk, not just a single drive.

    I've used MiniTool Partition Wizard myself for this purpose twice without any problems and you can select the destination C:\ drive size as you want.

    It defaults to filling the entire disk with C: partition after reserving space for EFI and recovery partitions - and even these are scaled based on target disk size.
    So yes you can clone from a 500 GB source disk to a 250 GB target disk as long as there's enough space for actual data.
     
    Last edited: Mar 25, 2020 at 2:07 PM
  10. Caesar

    Caesar Maha Guru

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  11. zipper

    zipper Maha Guru

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    In that case for instance VisuaBCD could be used to create the boot entry. I've used it to create an alternative boot partition.
     

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