How To Fix Windows 10 Unsupported Disk Layout UEFI Error

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_Cosmin_

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In video you create 16mb partition. In step-by-step tutorial you say it should be 128mb (as recommended by Micro$oft).
From where do you take that space (usually partitions tend to occupy all space available on disk)?
 

cjmcgee

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Don't you need to shrink one of the existing partitions first? And is there a restriction on where this partition can be? I know the UEFI partition has to be in the first 2 TiB of the disk.
 

Jsimenhoff

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16 MB is the default partition size for the MSR, while 128 MB is the recommended size for drives over 16GB. Partitions do not take up the whole space of a drive. They are a part of a drive, a segment if you will. This space needs to be reserved for Windows installations and recovery. This method allows you to re-partition your hard drive without erasing the data entirely. You can find out more about MSR and UEFI hard drive partitioning from this article on Microsoft's support site.
 

popatim

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What cjmcgee is saying is that users do not typically leave any free space when partitioning a drive.

You guys 'took the easy way out' by using a 60gb drive with only 34.5GB of space used by partitions. Ie- your tutorial is rather pointless in the real world.
 

jimmysmitty

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My question is why anyone makes a single partition for 10 considering every upgrade runs into this issue since it default looks for a separate partition. It was a pain with Windows 7 and 8.1 to 10 upgrades because 7 only had a 100MB partition so it needed to be expanded and 8.1 also sometimes had a smaller partition.

Our image for 10 here at work is a single partition and I am not a fan of it especially when it comes to upgrading Windows 10.

And you are correct as a normal drive would need to have the partition shrunk them re-allocated before this would work.
 

popatim

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I did not sday users only use a single partition. Windows install defaults to at least two and more if you use uEFI (up to 5 in default mode).

What i'm saying is most people do not have empty space on there drive to simply just add another partition. I know I don't and windows defaults to assigning the remainder of the drive as C: with maybe a couple of mb left on the end that it couldn't use. So unless you altered partitions durinig install or purposly shrunk C: afterwards, I don't see how this applies to most people.
 
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