20
Cooling module
Enclosure thermal sensor
Service (the Service signal to specify a specific enclosure)
Disk drives
Expansion Enclosure Identifier:
The managing Unified Storage System will sound the alarm and deliver warning messages if
there is a conflict between expansion enclosure IDs.
If more than one expansion enclosure is connected to the managing Unified Storage System,
each expansion enclosure needs a unique enclosure ID set using the rotary switch on the
LED panel. For example, the firmware automatically disconnects the second expansion
enclosure if it is connected online and comes with an ID identical to that of the first
expansion enclosure.
NOTE
The IDs for expansion enclosures are #1 to #15. For details, please refer to
Expansion enclosure connections
.
Cooling Module Speed Adjustment:
If any of the detected temperature readings breaches the temperature threshold, the
firmware running on the managing Unified Storage System automatically raises the rotation
speed of all cooling fans.
Expansion Enclosure Status Monitoring:
A Unified Storage System, when connected with expansion enclosures, acquires the
component status within other enclosures via a proprietary enclosure monitoring service
using the in-band connectivity. No additional management connection is required.
I
2
C bus
The detection circuitry and temperature sensors are interfaced through a non-user-
serviceable I
2
C bus. When expansion enclosures are attached to controllers, expansion
enclosure component status is reported through in-band protocols over expansion links that
is managed by a proprietary enclosure service.
Firmware (FW) and PAC Management Software
The firmware (FW) is preloaded and is used to configure the system. The FW can be
accessed through the PAC Management Software, a browser-based graphical user interface
(GUI) software that can be installed on a local/remote computer and accessed via the
network. The manager communicates with the array via the connection of the existing host
links or the Ethernet link to the array’s Ethernet port.
Audible Alarms
The system comes with audible alarms that are triggered when certain active components
fail or when certain controller or system thresholds are exceeded. Whenever you hear an
audible alarm, it is imperative that you determine the cause and rectify the problem
immediately.
