AWS Windows volume_to_drive_letter_mapping #windows #powershell

volume_to_drive_letter_mapping.ps1

# List the Windows disks

# Create a hash table that maps each device to a SCSI target
$Map = @{"0" = '/dev/sda1'} 
for($x = 1; $x -le 26; $x++) {$Map.add($x.ToString(), [String]::Format("xvd{0}",[char](97 + $x)))}
for($x = 78; $x -le 102; $x++) {$Map.add($x.ToString(), [String]::Format("xvdc{0}",[char](19 + $x)))}

Try {
    # Use the metadata service to discover which instance the script is running on
    $InstanceId = (Invoke-WebRequest '169.254.169.254/latest/meta-data/instance-id').Content
    $AZ = (Invoke-WebRequest '169.254.169.254/latest/meta-data/placement/availability-zone').Content
    $Region = $AZ.Substring(0, $AZ.Length -1)

    #Get the volumes attached to this instance
    $BlockDeviceMappings = (Get-EC2Instance -Region $Region -Instance $InstanceId).Instances.BlockDeviceMappings
}
Catch
{
    Write-Host "Could not access the AWS API, therefore, VolumeId is not available. 
Verify that you provided your access keys."  -ForegroundColor Yellow
}

Get-WmiObject -Class Win32_DiskDrive | % {
    $Drive = $_
    # Find the partitions for this drive
    Get-WmiObject -Class Win32_DiskDriveToDiskPartition |  Where-Object {$_.Antecedent -eq $Drive.Path.Path} | %{
        $D2P = $_
        # Get details about each partition
        $Partition = Get-WmiObject -Class Win32_DiskPartition |  Where-Object {$_.Path.Path -eq $D2P.Dependent}
        # Find the drive that this partition is linked to
        $Disk = Get-WmiObject -Class Win32_LogicalDiskToPartition | Where-Object {$_.Antecedent -in $D2P.Dependent} | %{ 
            $L2P = $_
            #Get the drive letter for this partition, if there is one
            Get-WmiObject -Class Win32_LogicalDisk | Where-Object {$_.Path.Path -in $L2P.Dependent}
        }
        $BlockDeviceMapping = $BlockDeviceMappings | Where-Object {$_.DeviceName -eq $Map[$Drive.SCSITargetId.ToString()]}
           
        # Display the information in a table
        New-Object PSObject -Property @{
            Device = $Map[$Drive.SCSITargetId.ToString()];
            Disk = [Int]::Parse($Partition.Name.Split(",")[0].Replace("Disk #",""));
            Boot = $Partition.BootPartition;
            Partition = [Int]::Parse($Partition.Name.Split(",")[1].Replace(" Partition #",""));
            SCSITarget = $Drive.SCSITargetId;
            DriveLetter = If($Disk -eq $NULL) {"NA"} else {$Disk.DeviceID};
            VolumeName = If($Disk -eq $NULL) {"NA"} else {$Disk.VolumeName};
            VolumeId = If($BlockDeviceMapping -eq $NULL) {"NA"} else {$BlockDeviceMapping.Ebs.VolumeId}
        }
    }
} | Sort-Object Disk, Partition | Format-Table -AutoSize -Property Disk, Partition, SCSITarget, DriveLetter, Boot, 
VolumeId, Device, VolumeName

#Reference : http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/ec2-windows-volumes.html