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Home > Success Center > Network Performance Monitor (NPM) > Incorrect volume size information on Orion for Linux devices

Incorrect volume size information on Orion for Linux devices

Updated April 3rd, 2016 

Overview

Orion is showing incorrect in volume information on Linux nodes.

Environment

  • NPM 11.5.3
  • Linux

Cause 

There are issues with Net-snmp running on Linux nodes.

Resolution

  1. Take a full SNMP walk from the node.
  2. Calculate the values manually using following OIDs:
    Volume:
    .1.3.6.1.2.1.25.2.3.1.3.38 = STRING: "/home/backup"
    Size:
    .1.3.6.1.2.1.25.2.3.1.5.38 = INTEGER: 1287418344
    Used:
    .1.3.6.1.2.1.25.2.3.1.6.38 = INTEGER: 1188399897
    Allocation unit size:
    .1.3.6.1.2.1.25.2.3.1.4.38 = INTEGER: 4096

    Disk size as per SNMP Walk:            1287418344 * 4096 = 5273265537024 (4.80 TB)
    Disk utilization as per SNMP Walk:        1188399897 * 4096 = 4867685978112 (4.43 TB)

    According to the information provided by the device, disk size is 4.8 TB and current disk utilization is 4.43 TB. This is consistent with screenshots from Orion provided by you. We rely on information provided by node over SNMP.

​See the What object IDs (OIDs) does NPM poll for volume information? What types of volume information does NPM poll? article for more information.

 

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