Map disks to volumes on your Windows instance

Aman Raiyyani
Map disks to EBS volumes on your Windows instance

List NVMe volumes

You can find the disks on your Windows instance using Disk Management or Powershell.

List NVMe disks using Disk Management

You can find the disks on your Windows instance using Disk Management.

To find the disks on your Windows instance

Log in to your Windows instance using Remote Desktop. For more information, see Connect to your Windows instance.

  1. Start the Disk Management utility.
  2. Review the disks. The root volume is an EBS volume mounted as C:\. If there are no other disks shown, then you didn’t specify additional volumes when you created the AMI or launched the instance.

The following is an example that shows the disks that are available if you launch an r5d.4xlarge instance with two additional EBS volumes.

List NVMe disks using PowerShell

The following CLI script lists each disk name and its corresponding volume ID.

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

Set-ExecutionPolicy RemoteSigned

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

# List the disks for NVMe volumes

function Get-EC2InstanceMetadata {
    (Invoke-WebRequest -Uri "$Path").Content 

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

function GetDriveLetter{
    $DiskNumber =  (Get-Disk -Path $Path).Number
    if($DiskNumber -eq 0){
        $VirtualDevice = "root"
        $DriveLetter = "C"
        $PartitionNumber = (Get-Partition -DriveLetter C).PartitionNumber
        $VirtualDevice = "N/A"
        $DriveLetter = (Get-Partition -DiskNumber $DiskNumber).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 in powershell in the location the file is saved in:
PS D:\> .\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

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