---
title: "Storage Adapter Performance Chart"
description: "The Storage Adapter chart displays historical statistics for the storage adapters on the selected host. The following table provides information on predefined views and counters."
canonical: "https://helpcenter.veeam.com/docs/one/userguide/vsphere_storage_adapter.html"
breadcrumb: "User Guide > VMware vSphere Monitoring > VMware vSphere Performance Charts > Storage Adapter Performance Chart"
dateModified: "2026-10-23"
---

# Storage Adapter Performance Chart

The **Storage Adapter** chart displays historical statistics for the storage adapters on the selected host.

[![Storage Adapter Performance Chart](images/vmware_storage_adapter_performance_chart.png "Storage Adapter Performance Chart")](images/vmware_storage_adapter_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;">Adapter IOPS</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter I/O</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 commands issued per second on a storage path during the collection interval.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter Read I/O</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 commands issued per second on a storage path during the collection interval.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter Write I/O</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 write commands issued per second on a storage path during the collection interval.</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;">Adapter Usage Rates</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter Read Rate</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">MB/s</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Rate at which data is read on a storage path.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter Write Rate</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">MB/s</p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Rate at which data is written on a storage path.</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;">Adapter Latency</span></p>
    </td>
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter Read Latency</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 amount of time that a read operation on a storage path takes.</p>
    </td>
  </tr>
  <tr style="vertical-align:top">
    <td style="vertical-align:top;">
      <p style="text-align:left;">Adapter Write Latency</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 amount of time that a write operation on a storage path takes.</p>
    </td>
  </tr>
</table>