Storage server statistics

Server and Cluster Administration Guide for Hitachi NAS Platform

Part Number

The NAS Platform provides extensive statistics that can be used to monitor operation. For NAS modules, an external NAS Manager can display the available data. Statistics include:

  • Networking (Ethernet and TCP/IP)
  • Fibre Channel ( (HNAS server only)
  • File access protocols (CIFS, NFS, and FTP)
  • Block access protocols (iSCSI)
  • Management access for supported access protocols (SNMP and SSC for some NAS server models, or SNMP, SSC, Telnet, and SNMP for more recent NAS server models)
  • Virus scanning

Data is gathered at short intervals (typically every 10 seconds) and these data points are kept for the previous 24 hours. For data older than 24 hours, the data is periodically aggregated; the raw data is averaged and only a single hourly average value is kept. Aggregating the data in this fashion minimizes the overhead of millions of data points, and allows data to be retained long-term storage. If all the data points were retained, the data set would quickly grow, and would become unmanageable. The system stores the performance data for 1 year in order to provide a long-term, historical view of system performance.

In addition to the statistics, performance graphs are also provided.