Free performance monitoring tool for servers, storages, SAN and LAN

Free SAN and storage performance and capacity monitoring

The tool offers you end-to-end views of your storage environment including NAS and SAN and can save you significant money in operation monitoring and by predicting utilization bottlenecks in your virtualized environment.
You can also generate policy-based alerts, view overall health status of your systems, reduce service downtime, use capacity and forecasting data, and simplify the identification of virtualization or cloud aspirant.
  • Real-time storage performance visibility into multi-vendor environment including NAS and SAN
  • Agentless monitoring to include performance details
  • Alerting based on performance tresholds
This program is free software. You can redistribute it and/or modify it under the terms of the GNU General Public License.

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POOL: write IO - month

Pool example
PORT: data rate - week

Port example
RANK: read resp time - week

Rank example
VOLUME: data rate - week

Volume data rate example

Supported Storage Devices


  • NetApp FAS (OnTAP 7-mode)
  • NetApp FAS (Clustered Data OnTAP (CDOT))
  • NetApp E-series


  • IBM System Storage DS8000, DS6800
  • IBM FlashSystem V9000, V840
  • IBM Storwize family (V7000, V5000 and V3700)
  • IBM Spectrum Virtualize (SVC)
  • IBM XIV Storage System
  • IBM DS3xxx, 4xxx, 5xxx
  • IBM DCS3700


  • Hitachi Data Systems VSP-G
  • Hitachi Data Systems HUS-VM
  • Hitachi Data Systems VSP
  • Hitachi Data Systems HUS
  • Hitachi Data Systems AMS


  • HPE StorageWorks XP7
  • HPE StoreServ® 3PAR

Other Vendors

Supported SAN Devices


  • Cisco MDS
  • Cisco Nexus


Under development


We get many inputs from storage admins to cover support of further storages from different vendors.
Below you can find a list with sugested storages. We will consider it for our future roadmap. You can vote for your storages if they are on the list or suggest new one. More votes, bigger chance we go for it.
List of considered storages

Complete support matrix

How it works

System diagram STOR2RRD
Product roadmap