Custom alerts and data visualization let you quickly identify and prevent storage space issues.
Paessler PRTG is your IT assistant, attentively running in the background, regulating available hard disk space, and providing prompt alerts when there’s an impending deficiency in space or memory.
Planning for future capacity needs can be challenging. Monitoring disk space with PRTG gives you a single, easy-to-understand overview to help you stop unexpected resource shortages, locate “zombie” processes, and reduce overprovisioning instances.
Monitoring can also show you which applications and processes use the most disk space, so you can make more informed resource allocation decisions.
Every network contains processes that write data onto the hard disk. Running out of disk space or memory can lead to slow network performance, crashed applications, and bottlenecks in the system.
PRTG performance monitoring ensures server disk space is available for automatic updates, saving user data, and putting data into CRM and ERP software formats.
PRTG memory and disk monitoring provide early warning signs of potential issues like low disk space or memory leaks, giving you the extra edge you need to keep your file servers and network running smoothly.
Set your desired alerting threshold value and get back to other tasks. Administrators are alerted when the free space metric falls below this threshold and can proactively free up disk space.
Hardware monitoring helps you identify hard drives or memory modules that are failing before they cause network outages or data loss.
Not only does disk space monitoring allow administrators to perform timely hardware maintenance, but it also helps ensure application stability by reducing memory leaks and high memory usage.
Diagnose network issues by continuously tracking disk space on servers, storage and file systems, and other network devices. Show disk space usage, CPU load, and other key metrics in real time. Visualize monitoring data in clear graphs and dashboards to identify problems more easily. Gain the overview you need to troubleshoot disk space issues and prevent network downtime.
PRTG storage monitoring
Device tree view of the complete monitoring setup
Custom PRTG dashboard for keeping an eye on the entire IT infrastructure
Live traffic data graph in PRTG
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Existing hard drives, their status, and the available disk space are automatically recognized during setup so that you have nothing more to do.
PRTG’s alert system works in real time, notifying you via SMS, email, or in-app push notification when the free disk space value falls below a predefined threshold. Hours of work are saved. Work processes are uninterrupted.
Data is becoming more and more valuable, and the loss of precious information (for example, customer data) can be extremely costly. With PRTG, data losses due to failed save attempts are avoided.
There’s no need to verify free disk space yourself. PRTG monitors this for you and directly lets you know when free space runs low.
PRTG comes with more than 250 native sensor types for monitoring your entire on-premises, cloud, and hybrid cloud environment out of the box. Check out some examples below!
The SSH Disk Free sensor monitors the free space on disks of a Linux/Unix system using Secure Shell (SSH). It can show the following:
The SNMP Linux Disk Free sensor monitors the free space on disks of a Linux/Unix system. It can show the following:
The SNMP Disk Free v2 sensor monitors the free disk space on a logical disk. It can show the following:
The Share Disk Free monitors free disk space of a share (Windows/Samba) using Server Message Block (SMB). It can show the following:
See the PRTG Manual for a list of all available sensor types.
Custom alerts and data visualization let you quickly identify and prevent storage space issues.
Set up PRTG in minutes and use it on almost any mobile device.
For NetApp, Paessler has proven to be one of the qualified, best-of-breed infrastructure and application providers whose products have been tested to expertly integrate with NetApp storage systems.
What does this mean for you?
Partnering with innovative IT vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.
baramundi and PRTG create a secure, reliable and powerful IT infrastructure where you have everything under control - from the traffic in your firewall to the configuration of your clients.
With the combination of PRTG and Insys, the monitoring specialist Paessler and the industrial gateway manufacturer INSYS icom offer a practical possibility to merge IT and OT.
Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.
Real-time notifications mean faster troubleshooting so that you can act before more serious issues occur.
Network Monitoring Software – Version 26.1.116.1532 (February 9th, 2026)
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Disk space monitoring tracks and analyzes the storage space in a networked environment to understand the use and availability of drive space. This is essential for maintaining the health, performance, and reliability of a network’s infrastructure.
When a server’s disk space is low, you’ll quickly start to notice a degradation in performance, as well as a failure of automated tasks. Without the available space to handle backups, updates, and data saves, servers cannot work properly.
PRTG monitors disk space on Windows servers, Linux servers and web servers using dedicated sensors that track available storage. It employs WMI or SNMP protocols to check Windows servers, ensuring that you're alerted before disks run low on space. For web servers, PRTG monitors file storage, including web content and log files, regardless of the operating system.
The system allows setting thresholds that trigger notifications via email, SMS, or push notification if disk space is running low, enabling prompt action to manage storage and maintain server efficiency. This proactive monitoring ensures servers are not compromised due to insufficient disk space.
PRTG is a hard disk space checker for Windows, Linux and Unix systems and can monitor disk space on physical and virtual drives.
It’s essential to take immediate action to prevent data loss and system crashes. There are several viable options, including:
In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, for example the traffic of a switch port, the CPU load of a server, or the free space on a disk drive. On average, you need about 5-10 sensors per device or one sensor per switch port.
Paessler conducted trials in over 600 IT departments worldwide to tune its network monitoring software closer to the needs of sysadmins. The result of the survey: over 95% of the participants would recommend PRTG – or already have.
Paessler PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.
Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.
Everyone has different monitoring needs. That’s why we let you try PRTG for free.
