如何知道哪个分区未分配空间可用？ （Powershell或Command）

Question

I am trying to use Command or PowerShell to know where on a disk unallocated space is available.

For example below the unallocated space is present after G: drive (or Partition 1).

Using the command echo list disk | diskpart echo list disk | diskpart I can only know the Unallocated space.

Is there any way to know this information?

Answer 1

Solution for Windows 8/2012 Server or newer:

I think you could do this (needs to be run with Administrator rights) to return an object with each volume that can be extended (from which you can then deduce there is free space after the volume):

Get-Volume | Where DriveLetter -ne $null | ForEach-Object {
    $Size = Get-PartitionSupportedSize -DriveLetter $_.DriveLetter
    If ($Size.SizeMax -gt $_.Size) { $_ }
}

• Get-Volume | Where DriveLetter -ne $null Get-Volume | Where DriveLetter -ne $null gets all drives that have a letter
• $Size = Get-PartitionSupportedSize -DriveLetter $_.DriveLetter gets the sizemin and sizemax of each drive
• If ($Size.SizeMax -gt $_.Size) { $_ } returns the volumes which can be extended (their size max is bigger than the current volume size).