Getting false "DISK NO LONGER AVAILABLE" alarm upon monitoring RFC2790 File System
Article ID: 7417
Updated On:
Products
Issue/Introduction
I am getting false "DISK NO LONGER AVAILABLE" alarm (Cause Code = 0xc40060) upon monitoring RFC2790 File System.
The File System model that is getting the alarm is not offline. The target Server is a Linux machine running net-snmp and when I monitored the File System I have selected the "Alarm if offline" check box in File System Monitoring entry of System Resources -> File System -> Monitored File System (RFC2790) table.
Environment
Cause
OID 1.3.6.1.2.1.25.1.6 (hrSystemProcesses) is not accessible from the net-snmp database. Spectrum uses this OID to determine if the subAgent is down. For File System monitor to function correctly, net-snmp has to be configured to expose OID 1.3.6.1.2.1.25.1.6 (hrSystemProcesses).
Resolution
Configure net-snmp to expose OID 1.3.6.1.2.1.25.1.6 (hrSystemProcesses). For example, below is less restrictive access net-snmp configuration (/etc/snmp/snmpd.conf) that will expose the OID. Please work with net-snmp Administrator to configure net-snmp properly that suits your company policy.
# -----------------------------------------------------------------------------
# Here is a commented out example configuration that allows less
# restrictive access.
# YOU SHOULD CHANGE THE "COMMUNITY" TOKEN BELOW TO A NEW KEYWORD ONLY
# KNOWN AT YOUR SITE. YOU *MUST* CHANGE THE NETWORK TOKEN BELOW TO
# SOMETHING REFLECTING YOUR LOCAL NETWORK ADDRESS SPACE.
## sec.name source community
com2sec local localhost public
com2sec mynetwork default public
## group.name sec.model sec.name
group MyRWGroup any local
group MyROGroup any mynetwork
## incl/excl subtree mask
view all included .1 80
## context sec.model sec.level prefix read write notif
access MyROGroup "" any noauth 0 all none none
access MyRWGroup "" any noauth 0 all all all
Additional Information
In the example below, the OID 1.3.6.1.2.1.25.1.6 (hrSystemProcesses) is available:
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