Getting false "DISK NO LONGER AVAILABLE" alarm upon monitoring RFC2790 File System

Document ID : KB000007417
Last Modified Date : 14/02/2018
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Issue:

I am getting false "DISK NO LONGER AVAILABLE" alarm (Cause Code = 0xc40060) upon monitoring RFC2790 File System.

DiskNoLongerAvailable.png

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:
Spectrum 9.4.x, 10.x on all platforms.Net-SNMP on Linux machine
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