---
title: "Local Volume Performance Chart"
description: "The Disk chart displays historical statistics on disk usage for the selected local volume. The following table provides information on predefined views and counters."
canonical: "https://helpcenter.veeam.com/docs/one/userguide/hyperv_local_volume.html"
breadcrumb: "User Guide > Hyper-V Monitoring > Microsoft Hyper-V Performance Charts > Local Volume Performance Chart"
dateModified: "2026-10-23"
---

# Local Volume Performance Chart

The **Disk** chart displays historical statistics on disk usage for the selected local volume.

[![Local Volume Performance Chart](images/hyperv_local_volume_performance_chart.png "Local Volume Performance Chart")](images/hyperv_local_volume_performance_chart.png){.toggle scale=50}

The following table provides information on predefined views and counters.

<table class="Blue_Table">
  <tr style="vertical-align:top">
    <th>
      <p>Chart View</p>
    </th>
    <th>
      <p>Counter</p>
    </th>
    <th>
      <p>Measurement Unit</p>
    </th>
    <th>
      <p>Description</p>
    </th>
  </tr>
  <tr style="vertical-align:top">
    <td rowspan="3" style="vertical-align:top;">
      <p style="text-align:left;"><span style="font-weight:bold;">Datastore Usage</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Disk Read</p>
    </td>
    <td style="vertical-align:top;">
      <p>MB/s</p>
    </td>
    <td style="vertical-align:top;">
      <p>Rate at which data is read from a volume.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Disk Write</p>
    </td>
    <td style="vertical-align:top;">
      <p>MB/s</p>
    </td>
    <td style="vertical-align:top;">
      <p>Rate at which data is written to a volume.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Disk</p>
    </td>
    <td style="vertical-align:top;">
      <p>MB/s</p>
    </td>
    <td style="vertical-align:top;">
      <p>Sum of read and write rates for a volume.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;"><span style="font-weight:bold;">Datastore Queue Length</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Avg. Disk Queue Length</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Number</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Average number of read and write operations queued for a volume.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;"><span style="font-weight:bold;">Datastore IOPS</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Disk Transfers/sec</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Number</p>
    </td>
    <td style="vertical-align:top;">
      <p>Number of read and write operations completed per second, regardless of how much data they involve.</p>
      <p>This counter measures disk utilization. If the value exceeds 50, it can be an indicator of a bottleneck.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td rowspan="2" style="vertical-align:top;">
      <p style="text-align:left;"><span style="font-weight:bold;">Datastore Latency</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Avg Disk sec/Read</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Millisecond</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Average time that a read operation from a volume takes.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Disk/Physical Disk: Avg Disk sec/Write</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Millisecond</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Average time that a write operation to a volume takes.</p>
    </td>
  </tr>
</table>