Create the initial configuration with the New-AzureRmDiskConfig command. The following command configures a disk that is 128 GB in size. Copy and paste it into your PowerShell session and run it. The new disk configuration is stored in a variable called $diskConfig so it can be more easily referenced in later commands:

$diskConfig = New-AzureRmDiskConfig `
 -Location "EastUS" `
 -CreateOption Empty `
 -DiskSizeGB 128

The preceding command generates no feedback on the screen.