---
title: "Unmapped Datastore LUNs"
description: "This report provides information about all detected shared datastores that are not mapped to any existing backup proxy. If you are going to use the Direct SAN Access mode, datastore LUNs must be mapped to a proxy server."
canonical: "https://helpcenter.veeam.com/docs/one/userguide/unmapped_datastore_luns.html"
breadcrumb: "User Guide > Reports > Predefined Veeam ONE Reports > Unmapped Datastore LUNs"
dateModified: "2026-10-23"
---

# Unmapped Datastore LUNs

This report provides information about all detected shared datastores that are not mapped to any existing backup proxy. If you are going to use the Direct SAN Access mode, datastore LUNs must be mapped to a proxy server.

- The **Summary** section provides an overview on the total number of datastores, the number of unmapped datastores, their capacity and the number of VMs on unmapped datastores.
- The **Details** section displays detailed mapped and unmapped datastore information, such as capacity the amount of free and used space, and the number of stored VMs.

## Report Parameters

You can specify the following report parameters:

- **Scope**: defines a virtual infrastructure level and its sub-components to analyze in the report.

::: note

Infrastructure topology view in Veeam ONE and Veeam Backup & Replication must match. Otherwise, Veeam ONE Web Client may show invalid data for Veeam Backup & Replication reports and dashboards.

:::



<div class="pdf-preview__container js-pdf-preview" data-pdf="./reports/Unmapped%20Datastore%20LUNs.pdf" title="View Report Example" style="width:392px; height:539px"><iframe class="pdf-preview__iframe" src="./reports/Unmapped%20Datastore%20LUNs.pdf#page=1&zoom=50&toolbar=0&navpanes=0&scrollbar=0&statusbar=0&pagemode=none" style="width:407px; height:559px"></iframe></div><a class="pdf-preview__link" href="./reports/Unmapped%20Datastore%20LUNs.pdf" target="_blank">View Report Example</a><div class="modal-pdf js-modal-pdf"><div class="modal-pdf__container"><iframe class="modal-pdf__iframe js-modal-pdf-iframe" src="about:blank"></iframe></div></div>



## Use Case

The Direct SAN Access mode is recommended if the ESXi host uses shared storage. In the Direct SAN mode, proxy servers will not be able to read data from LUNs if they are not mapped. This report allows you to detect datastore LUNs that are not mapped to any proxy server in your backup infrastructure.