---
title: "Datastores. Overprovisioned Storage"
description: "Thin provisioning allows administrators to allocate for virtual machines more storage space than there is real physical capacity. This report helps you reveal excessive storage over-provisioning in your virtual environment."
canonical: "https://helpcenter.veeam.com/docs/mp/vmware_guide/overprovisioned_datastores.html"
breadcrumb: "Veeam MP for VMware User Guides > Operations Guide > Reports > Veeam VMware Analysis Reports > Datastores. Overprovisioned Storage"
dateModified: "2026-09-08"
---

# Datastores. Overprovisioned Storage

Thin provisioning allows administrators to allocate for virtual machines more storage space than there is real physical capacity. This report helps you reveal excessive storage over-provisioning in your virtual environment.

## Example Output

In this example, the report allows you to show datastores with the largest amount of over-provisioned storage space for this month.

To run this report:

1. From the **From** list, select *This month > First day*. From the **To** list, select *Today*.
2. From the **Show details** list, select *Highest Disk Pressure*.
3. From the **Data Aggregation** list, select *Daily*.
4. Leave the **Scope** section without changes.
5. Click **Run** to view the report.

[![Overprovisioned Storage Report Settings](images/overprovisioned_storage_controls.png "Overprovisioned Storage Report Settings")](images/overprovisioned_storage_controls.png){.toggle scale=65}

The **TOP 5 Over-provisioned Datastores (GB)** chart will show 5 most over-provisioned datastores, and graphically display the difference between the datastore capacity, provisioned and used space. The **TOP 10 Over-allocated by Storage VMs** chart will show 10 VMs with excessive amount of allocated space, and graphically display the difference between allocated used and unused space.

[![Overprovisioned Storage Report Output](images/overprovisioned_storage_output.png "Overprovisioned Storage Report Output")](images/overprovisioned_storage_output.png){.toggle scale=65}

It can be seen from the report output that the most over-provisioned datastore of the previous month was *esx45:das1*, while the *ved-vc60-vtl* VM had the greatest amount of unused allocated space.

For each datastore, details tables will provide information on the number of VMs residing on the datastore, free and provisioned space, capacity, disk pressure and the percentage of provisioned space that is actually used.

[![Overprovisioned Storage Report Output Details](images/overprovisioned_storage_details.png "Overprovisioned Storage Report Output Details")](images/overprovisioned_storage_details.png){.toggle scale=65}

You can click a number in the **VMs** column of a details table to drill down to performance charts and statistics on storage space usage.

[![Overprovisioned Storage Report Output Details](images/perf_details_drilldown.png "Overprovisioned Storage Report Output Details")](images/perf_details_drilldown.png){.toggle scale=65}