Windows 10: Why does Windows install System Reserved parition into an unallocated drive?

Last night I decided to do a clean install of Windows since the 1909 update came out.

My setup is:

• Samsung SSD (Boot Drive)
• WD m.2 SSD (Storage)
• WD HDD (Storage)

I wanted to assign letters to the drive after installing Windows so I left both the m.2 and HDD unallocated. I created a partition on the Samsung SSD to install Windows on. After getting into Windows, I went into Disk Partitioner and saw that 500 MB was taken on the m.2 drive as System Reserved for misc Windows 10.

I tried cleaning the partition but unable to since it was part of the OS. I thought I might have made some mistake so I redid the whole process again to verify that I left both drives unallocated.

I also booted back into Windows 10 installation USB and deleted the partition from there but when then I was unable to boot back into Windows 10.

The only way I was able to get past this was disabling both my m.2 drive and HDD in the BIOS so I was left with only my Samsung SSD to install Windows on. Once I got back into Windows, I was able to clean the drive and extend the partition to the full size of my m.2 SSD.

Can anybody explain why this happened? The m.2 drive has never had an OS installed on it and has always been used as a storage drive for my games.

Thank you.

submitted by /u/sheepsheepsheepsheep
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:)

 

System Reserved Partition on Disk 1 not Disk 0

The results were the same as before: Windows is installed in a single 477 GB partition on Disk 0 and the System Reserved is in a 500 MB partition on Drive 1. The rest of Drive 1 is unallocated. This is identical to the configuration I had when I asked the
question.

The Media Creation Tool used to created the install ISO DVD is v. 10.0.14393 downloaded on 12/13/2016.

I followed your instructions:

• I selected Drive 0 and deleted the existing Windows partition.
• I clicked New and Apply. Windows then formatted Drive 0 as a single primary partition.
• The existing System Reserved partition was still on Drive 1.
• So I deleted the System Reserved partition on Drive 1 and the just created Primary partition on Drive 0
• I then selected Drive 0 and clicked New and Apply again. Same result a single Primary partition on Drive 0. Drive 1 was left unallocated.
• Upon completion of the install
  • Windows occupies about 15 GB in the only partition on Drive 0
  • The 500 MB System Reserved partition was placed on Drive 1
  • The rest of Drive 1 is unallocated.

How can I get the System Reserved partition to be placed as the Partition 1 on Drive 0 with Windows installed in Partition 2?

Thanks.

Bill

 

Unallocated Space to C Drive

Thanks

 

Unallocated Space to C Drive

Hi Travis,

It appears that a disk partition was created but was never assigned its allocation. Assuming there are no files stored in the unallocated partition, perform these steps to combine it with your C: drive:

• In Disk Management, right-click on (C which appears next to the
  Unallocated partition.
  
• Select Extend.

Let us know if you're able to combine the spaces after following the steps above.

Regards.