Extend Volume in Windows.
Two methods will be covered here. PowerShell and DiskPart

• PowerShell
• DiskPart
• Related
• Links

PowerShell

In this example a C:\ partition will be extended by 1 GB on a 100 GB disk .

• System Reserved 549 MB
• C: 99.46 GB

The Resize-Partition cmdlet will be used. It requires Size argument that is less than or equal to the LargestFreeExtent
To work out how much free space is available to the partition.
Disk:Size – Disk:AllocatedSize = LargestFreeExtent.
Or use the Get-PartitionSupportedSize cmdlet.

Get-Disk | Select-Object -Property Number,PartitionStyle,AllocatedSize,Size,LargestFreeExtent

Number : 0
PartitionStyle : MBR
AllocatedSize : 107374182400
Size : 108447924224
LargestFreeExtent : 1073741824

Get-Partition -DiskNumber 0

PartitionNumber DriveLetter Offset Size Type
--------------- ----------- ------ ---- ----
1 1048576 549 MB IFS
2 C 576716800 99.46 GB IFS

 Get-PartitionSupportedSize -DriveLetter C

SizeMin SizeMax
------- -------
27401424896 107870158848

Resize-Partition -DriveLetter C -Size 107870158848

or

Resize-Partition -DriveLetter C -Size 100.4619140625GB

Get-Disk | Select-Object -Property Number,PartitionStyle,AllocatedSize,Size,LargestFreeExtent

Number : 0
PartitionStyle : MBR
AllocatedSize : 108447924224
Size : 108447924224
LargestFreeExtent : 0

DiskPart

Open an administrative CDM or PowerShell Terminal.

diskpart

Microsoft DiskPart version 99.9.19041.9
Copyright (C) Microsoft Corporation.
On computer: test

list disk

Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 32 GB 1024 MB

list volume

Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 D  UDF DVD-ROM 950 MB Healthy
Volume 1 System Rese NTFS Partition 549 MB Healthy System
Volume 2 C NTFS Partition 32 GB Healthy Boot

select volume 2

Volume 2 is the selected volume.

extend size=1024

DiskPart successfully extended the volume.

exit

Leaving DiskPart…

exit

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Links

• https://docs.microsoft.com/en-us/windows-server/storage/disk-management/overview-of-disk-management