Map NVMe disks on Amazon EC2 Windows instance to volumes

The following PowerShell script lists each disk and its corresponding device name and volume. It is intended for use with Nitro-based instances, which use NVMe EBS and instance store volumes.

Connect to your Windows instance and run the following command to enable PowerShell script execution.

Set-ExecutionPolicy RemoteSigned

Copy the following script and save it as mapping.ps1 on your Windows instance.

# List the disks for NVMe volumes

function Get-EC2InstanceMetadata {
    param([string]$Path)
    (Invoke-WebRequest -Uri "http://169.254.169.254/latest/$Path").Content 
}

function GetEBSVolumeId {
    param($Path)
    $SerialNumber = (Get-Disk -Path $Path).SerialNumber
    if($SerialNumber -clike 'vol*'){
        $EbsVolumeId = $SerialNumber.Substring(0,20).Replace("vol","vol-")
    }
    else {
       $EbsVolumeId = $SerialNumber.Substring(0,20).Replace("AWS","AWS-")
    }
    return $EbsVolumeId
}

function GetDeviceName{
    param($EbsVolumeId)
    if($EbsVolumeId -clike 'vol*'){
    
        $Device  = ((Get-EC2Volume -VolumeId $EbsVolumeId ).Attachment).Device
        $VolumeName = ""
    }
     else {
        $Device = "Ephemeral"
        $VolumeName = "Temporary Storage"
    }
    Return $Device,$VolumeName
}

function GetDriveLetter{
    param($Path)
    $DiskNumber =  (Get-Disk -Path $Path).Number
    if($DiskNumber -eq 0){
        $VirtualDevice = "root"
        $DriveLetter = "C"
        $PartitionNumber = (Get-Partition -DriveLetter C).PartitionNumber
    }
    else
    {
        $VirtualDevice = "N/A"
        $DriveLetter = (Get-Partition -DiskNumber $DiskNumber).DriveLetter
        if(!$DriveLetter)
        {
            $DriveLetter = ((Get-Partition -DiskId $Path).AccessPaths).Split(",")[0]
        } 
        $PartitionNumber = (Get-Partition -DiskId $Path).PartitionNumber   
    }
    
    return $DriveLetter,$VirtualDevice,$PartitionNumber

}

$Report = @()
foreach($Path in (Get-Disk).Path)
{
    $Disk_ID = ( Get-Partition -DiskId $Path).DiskId
    $Disk = ( Get-Disk -Path $Path).Number
    $EbsVolumeId  = GetEBSVolumeId($Path)
    $Size =(Get-Disk -Path $Path).Size
    $DriveLetter,$VirtualDevice, $Partition = (GetDriveLetter($Path))
    $Device,$VolumeName = GetDeviceName($EbsVolumeId)
    $Disk = New-Object PSObject -Property @{
      Disk          = $Disk
      Partitions    = $Partition
      DriveLetter   = $DriveLetter
      EbsVolumeId   = $EbsVolumeId 
      Device        = $Device 
      VirtualDevice = $VirtualDevice 
      VolumeName= $VolumeName
    }
	$Report += $Disk
} 

$Report | Sort-Object Disk | Format-Table -AutoSize -Property Disk, Partitions, DriveLetter, EbsVolumeId, Device, VirtualDevice, VolumeName

Run the script as follows:

PS C:\> .\mapping.ps1

The following is example output for an instance with a root volume, two EBS volumes, and two instance store volumes.

Disk Partitions DriveLetter EbsVolumeId           Device    VirtualDevice VolumeName
---- ---------- ----------- -----------           ------    ------------- ----------
   0          1 C           vol-03683f1d861744bc7 /dev/sda1 root
   1          1 D           vol-082b07051043174b9 xvdb      N/A
   2          1 E           vol-0a4064b39e5f534a2 xvdc      N/A
   3          1 F           AWS-6AAD8C2AEEE1193F0 Ephemeral N/A           Temporary Storage
   4          1 G           AWS-13E7299C2BD031A28 Ephemeral N/A           Temporary Storage

If you did not configure your credentials for Tools for Windows PowerShell on the Windows instance, the script cannot get the EBS volume ID and uses N/A in the EbsVolumeId column.