Lost Partition on Primary SSD (Need I worry?)

jdUnionngarden · 03 Dec 2020

Windows 10 Pro - 1909, OS Build: 18363.1198; 500GB M.2 SSD & 1TB HDD

Howdy Folks

After an unexpected reboot, a look at my Event Viewer led me to check my disks and noticed my Primary SSD now has only 4 partitions; previously I also had an Unformatted 128.0 MB partition which I confirmed with a look at my last Macrium Definition File [which I ran before installing monthly update KB4586786 on Nov 24th (may or may not be related to this issue)].
See attached (2)

All thoughts, suggestions and comments will be greatly appreciated.

NavyLCDR · 03 Dec 2020

It's still there. It just doesn't show up in disk management (and never has shown up in disk management).

Code:

diskpart
select disk 1
list part

It's the Microsoft System Reserved Partition that is standard on GPT partitioned disks.

jdUnionngarden · 03 Dec 2020

@NavyLCDR
Thanks, I was hoping it was NBD.
How do I run the code CMD or PowerShell?

NavyLCDR · 03 Dec 2020

jdUnionngarden said:

@NavyLCDR
Thanks, I was hoping it was NBD.
How do I run the code CMD or PowerShell?

Either one, command or powershell.

Paul Black · 03 Dec 2020

jdUnionngarden said:

@NavyLCDR
Thanks, I was hoping it was NBD.
How do I run the code CMD or PowerShell?

Copy ALL 3 lines of code at once into an elevated cmd prompt and press <Enter>.

I hope this helps.

jdUnionngarden · 03 Dec 2020

Paul Black said:

Copy ALL 3 lines of code at once into an elevated cmd prompt and press <Enter>.

I hope this helps.

Indeed it does! I neglected 'elevated'
Today I'm a little smarter, with thanks to you

Paul Black · 03 Dec 2020

jdUnionngarden said:

Indeed it does! I neglected 'elevated'
Today I'm a little smarter, with thanks to you

You are VERY welcome.