# What is storage monitoring? By: Visakh 7 minutes Last updated: August 20, 2026 Storage monitoring is the practice of continuously tracking the capacity, performance, and health of storage systems. This includes disk arrays, SAN and NAS devices, cloud volumes, and everything in between. Monitoring allows IT teams to catch storage issues before they cause downtime. It works by collecting metrics like used capacity, IOPS, latency, and error rates directly from storage hardware and software. Then, processing them using dashboards, thresholds, and alerts. Without it, teams face unexpected storage problems. Applications grinding to a halt, volumes filling up overnight, or drives that fail silently. ## Why is storage monitoring important? Storage sits underneath almost everything else in an IT environment: databases, VMs, backups, or applications. So when it degrades, the damage rarely stays contained to storage alone. Several factors in modern IT systems highlight the need for storage monitoring. ### Challenges of storage monitoring Fragmented environments: Your data is spread across many places. It lives in on-site SAN and NAS hardware, edge devices, and public clouds all at once. Teams end up juggling separate dashboards for each. Each dashboard shows its own piece of the puzzle. But none of them show how that piece affects the app running on top of it. Capacity planning: Modern services like high-def video, big data, and generative AI eat up storage resources fast. Redundant and orphaned files pile up quietly. This can lead to capacity crunches in self hosted-setups. Cloud storage often bills you as you go, often leading to high costs. Without capacity planning, storage resources can't be planned and provisioned properly. Alert fatigue: Most monitoring tools are reactive. They trigger alerts without correlating and consolidating metrics. This can cause alarm floods, and impede troubleshooting during outages. ### Benefits of storage monitoring With consistent monitoring you get visibility into storage arrays. This can be beneficial in multiple ways. - Outage prevention: A volume that quietly fills to 100% can stall every application writing to it. Monitoring flags capacity issues while there's still time to act. - Faster troubleshooting: When an application slows down, storage is one of the first places to check. Monitoring gives you the latency, IOPS, and throughput data to confirm or rule out storage issues. - Capacity forecasting: Trend data on how fast volumes are filling lets teams plan upgrades and justify the budget for new capacity ahead of time. Rather than making emergency purchases. - Security and anomaly detection: Ransomware often shows up first as unusual write activity or a spike in file modifications, patterns that capacity and performance monitoring can catch before encryption finishes spreading. - Cost control: Visibility into which volumes are over-provisioned or barely used helps teams reclaim wasted capacity instead of buying more. ## What does storage monitoring cover? Modern storage technologies use different devices, mechanisms, and components to store and share data. To attain in-depth visibility, you have to monitor each. - **Physical disks:** Individual hardware drives (HDDs or SSDs) that store raw data magnetically or on flash memory chips within a server. - **RAID arrays:** Groups of physical drives combined into a single logical unit to increase system performance, provide fault tolerance, or both. - **SAN and NAS:** SAN delivers high-speed block-level storage over dedicated networks; NAS offers file-level storage shared across standard local networks. - **Storage pools and LUNs:** Storage pools aggregate raw drive capacity into shared resources, while LUNs carve those pools into virtual drives for servers. - **Tape libraries:** Automated robotics systems using physical magnetic tapes for high-capacity, low-cost, long-term data archiving and disaster recovery. - **Cloud volumes:** Virtual block storage drives hosted by cloud providers that attach to virtual machines for persistent enterprise data retention. ## How does storage monitoring work? IT teams use dedicated [storage monitoring tools](https://www.manageengine.com/network-monitoring/storage-monitoring.html) to measure the performance of their NAS and SAN arrays. These tools vary in scope, but most good storage monitoring tools share functionalities. Together, they turn raw data into insights that IT teams can act on. ### Data collection The primary aspect of storage monitoring is collecting data from different sources in the storage layer. There are two ways to achieve this. Agent-based monitoring installs a small software agent on or near the storage system to collect detailed metrics. It can monitor more granular data but adds overhead to deploy and maintain across a large environment. Agentless monitoring pulls data using protocols and APIs the storage system exposes like: SNMP, SMI-S, or vendor-specific REST APIs, without installing anything extra. This is the more common approach for arrays and NAS/SAN devices today, since most vendors ship with these interfaces enabled by default. ### Performance monitoring Once the mechanism of data collection is set, the next important thing is to specify what metrics to collect. Storage monitoring isn't limited to one metric, it's usually built around three connected areas. A mature storage monitoring tool tracks all three together, since a problem in one often shows up as a symptom in another. Capacity: This tracks how much storage is used versus available, at the disk, volume, pool, or array level. Performance: Performance monitoring measures how efficiently data moves through the system: IOPS (input/output operations per second), throughput, and latency. Availability and health: This checks the status of the physical and logical components underneath your data, disks, RAID groups, controllers, and file systems, so a failing drive or a degraded RAID set gets flagged before it turns into data loss. Learn more about storage performance monitoring and key metrics. ### Alerting Raw metrics are only useful if something acts on them. Monitoring tools evaluate metrics against thresholds, and alert someone when those thresholds are violated. - These threshold conditions can be static: for instance, alert if the temperature crosses 60C. - They can be [adaptive thresholds](https://www.manageengine.com/network-monitoring/adaptive-thresholds.html) that change based on historical patterns. This can be suited for metrics like IOPs or latency, which can vary based on seasonal fluctuations. - Some alerts use layered ML inference to generate alerts before the metric crosses a threshold. This is perfectly suited for capacity issues as it gives IT teams time to act for capacity is exhausted. You can choose the right alerting mechanism that works for you and configure notifications via email, SMS, or ticket when a threshold is crossed. Storage monitoring tools like OpManager offers integrations with ITSM, chat, and automation tools. Here, you can tie an alert to incident response workflows, reducing the MTTR. ### Reporting The last step in providing insights that IT teams can act on, is to make the data easily accessible. Reports turn raw data into dashboards, graphs, and charts. They help IT teams spot trends and share storage health with relevant stakeholders. ## Storage monitoring vs storage management These terms get used interchangeably, but they describe different jobs: - Storage monitoring is about visibility, collecting and finding data on capacity, performance, and health so you know what's happening right now. - Storage management is the broader set of practices built on top of that visibility, provisioning, tiering, data lifecycle policies, replication, and capacity planning. Management is what you do with the information monitoring gives you. ## Who uses storage monitoring software? - Infrastructure Teams: Teams managing IT infrastructure monitor physical storage area networks (SAN) and network-attached storage (NAS) arrays to prevent hardware failures. - DevOps and SRE teams: These teams track cloud volumes (like AWS EBS or Google Cloud Storage) and enterprise disk arrays to ensure production workloads have enough disk space to run smoothly. - Database Administrators (DBAs): DBAs monitor storage input/output (I/O) speeds to optimize app and query performance. - Security & Compliance teams: They use these tools to audit data access logs, detect ransomware patterns, and ensure regulatory compliance. ## What to look for when choosing a storage monitoring tool? Storage no longer lives in one place. Most organizations run a mix of on-premises arrays (SAN and NAS), direct-attached storage, and cloud storage , AWS EBS and S3, Azure Disk and Blob Storage, Google Cloud Storage, often all at once. Monitoring each environment with a separate tool creates blind spots when data or workloads move between on-prem and cloud. A monitoring tool built for hybrid infrastructure pulls capacity, performance, and health data from every environment into one place. Learn more about choosing the best storage monitoring tools in our article! ## Learn more about storage monitoring ### Storage monitoring with OpManager Check out ManageEngine OpManager's storage monitoring capabilities! [Learn more →](https://www.manageengine.com/network-monitoring/storage-monitoring.html) - [HDD vs SSD](https://www.manageengine.com/network-monitoring/tech-topics/hdd-vs-ssd.html) - [What are RAIDs?](https://www.manageengine.com/network-monitoring/tech-topics/raid-configurations.html) - [Tape libraries explained](https://www.manageengine.com/network-monitoring/tape-library-management.html) - [NAS vs SAN](https://www.manageengine.com/network-monitoring/tech-topics/san-vs-nas.html) ![Author](https://www.manageengine.com/itom/free-training/images/presenter/visakh.webp) By Visakh, ManageEngine Team Editorial expert who enjoys elucidating the technical jargon of the IT industry into relatable, easy-to-read content. Specializes in ITOps, network monitoring, and full-stack observability.