---
title: "Datastores. Overprovisioned Storage"
description: "This report helps you detect datastores for which the amount of provisioned storage space exceeds datastore capacity. Thin provisioning allows administrators to allocate for virtual machines more storage space than there is real physical capacity."
canonical: "https://helpcenter.veeam.com/docs/mp/reports/overprovisioned_datastores.html"
breadcrumb: "Veeam MP Report Knowledge > Veeam VMware Analysis Reports > Datastores. Overprovisioned Storage"
dateModified: "2026-09-10"
---

# Datastores. Overprovisioned Storage

This report helps you detect datastores for which the amount of provisioned storage space exceeds datastore capacity.

## Description

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

## Parameters

Date/time Selection: defines the time period to analyze in the report.

Show details: defines how data will be sorted in the report tables. If you want to report on overprovisioned datastores, select *Highest Disk Pressure*. If you want to report on overprovisioned datastores which are about to run out of free space and affect VM performance, select *Least Free Space*.

Data Aggregation: defines whether data in the report will be aggregated to *Hourly* or *Daily* values.

Scope: defines a list of Groups or Objects that will be analyzed in the report (by default, the **VMware Datastores** group is selected). The **Add Group** option returns a Group and all objects that a group contains. The **Add Object** option returns only the selected object.

## Sample Usage

Report on datastores with the largest amount of over-provisioned storage space. Use statistics for the previous month as a ground for the report analysis.

### Instructions

1. Open the Datastores. Overprovisioned Storage report.
2. From the **From** list, select *Previous month > First day*. From the **To** list, select *Previous month > Last day*.
3. From the **Show details** list, select *Highest Disk Pressure*.
4. From the **Data Aggregation** list, select *Daily*.
5. Leave the **Scope** section without changes.
6. Click **Run** to view the report.

### Report Output

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.

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.

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.