User guide

Overview
47
Chapter 4: System Monitoring
This Chapter describes the devices used to monitor the
SANbloc Series. The location of the monitoring LEDs and
how to interpret them is provided.
Overview
The front mounted LS module is the main monitoring
device of the SANbloc Series. This module is comple-
mented by status and fault LEDs, mounted on all the major
components of the enclosure, such as, disk drives, power
supplies, and Advanced Cooling Modules (ACMs). All these
monitoring devices are discussed in the following sections.
LS Module
The LS Module (Loop Resiliency and SES Module)
provides monitoring and control for the SANbloc Series.
The module reports status and receives control information
over the Enclosure Services Interface (ESI) port of any of
the fourteen disk drives installed in the enclosure. The LS
Module also provides loop resiliency for the Fibre Channel
loop (in the form of Port Bypass Circuits).
The SANbloc Series contains one LS Module as standard.
However, a second optional LS Module is available to
provide active/passive fail over for the enclosure services
communication, and to provide a second Fibre Channel
Loop. Only one LS Module communicates (using ESI
communication) with the host system at any one time, but
both LS modules will continuously monitor the system. If