Мониторинг загрузки HDD - VB

Public Class ...
 
    Private HddLedWrite As System.Diagnostics.PerformanceCounter
    Private HddLedRead As System.Diagnostics.PerformanceCounter
 
    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        HddLedRead = New System.Diagnostics.PerformanceCounter
        HddLedRead.CategoryName = "PhysicalDisk"
        HddLedRead.CounterName = "Disk Read Bytes/sec"
        HddLedRead.InstanceName = "_Total"
        HddLedWrite = New System.Diagnostics.PerformanceCounter
        HddLedWrite.CategoryName = "PhysicalDisk"
        HddLedWrite.CounterName = "Disk Write Bytes/sec"
        HddLedWrite.InstanceName = "_Total"
    End Sub
 
    Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
        Dim I As Integer
        Dim Item As Object
        Dim DrivesInfo() As IO.DriveInfo
        Dim Read As Single = HddLedRead.NextValue
        Dim Write As Single = HddLedWrite.NextValue
        DrivesInfo = IO.DriveInfo.GetDrives()
        ReDim Drives(-1)
        For Each Item In DrivesInfo
            If Item.DriveType = IO.DriveType.Fixed Then
                I = Drives.Length
                ReDim Preserve Drives(I)
                Try
                    With Drives(I)
                        .Name = Item.Name.Replace("\", "")
                        .LowSpace = Item.TotalFreeSpace / 1048576 < LowSpace
                        .System = .Name = Environment.GetEnvironmentVariable("SystemDrive")
                        .TotalFreeSpace = Item.TotalFreeSpace
                        .TotalSize = Item.TotalSize
                        .VolumeLabel = IIf(Len(Item.VolumeLabel) = 0, "Local Disk", Item.VolumeLabel)
                    End With
                Catch ex As Exception
                    'Диск извлечен
                End Try
            End If
        Next
        Application.DoEvents()
    End Sub
 
End Class