User guide

Chapter 2 Components
> 2.2 2.5" Type Controller Enclosure
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
61
Copyright 2010 FUJITSU LIMITED
P3AM-3042-06ENZ0
• ETERNUS DX90 Fibre Channel model
Figure 2.17
shows the ETERNUS DX90 Fibre Channel model controller.
Figure 2.17 ETERNUS DX90 Fibre Channel model controller
■ System Capacitor Unit (SCU)
An SCU is installed in the controller as a backup power source in case of power outage.
MASTER LED
Glows green ( ) when the controller is set
as the Master CM.
UNIT READY/FAULT LED
Glows green ( ) during normal operation.
Glows orange ( ) during the post power on
initialization phase. Also glows orange ( ) to
indicate a fault has been detected.
FAULT LED
Glows orange ( ) when a fault has been detected
in the Fibre Channel port.
FC LINKUP LED
Glows green ( ) when link has been established.
SAS (DE) LINKUP LED
Glows green ( ) when link has been established.
SCU STATUS LED
Glows green ( ) when SCU is normal.
Blinks green ( ) when being charged
(for about one minute after the device power is turned on).
IDENTIFY LED
Blinks blue ( ) or turns off ( ) as ordered via GUI to identify the enclosure installation locations.
Fibre Channel ports (0, 1, 2, 3 from left)
Dual LC connectors for Fibre Channel cables.
SAS (OUT) port
Connector for a miniSAS cable
Used to connect the Controller Enclosure to a Drive Enclosure.
LAN port (1000Base-T/100Base-TX/10Base-T)
(RMT port (left), MNT port (right))
RJ45 connectors for LAN cables
Each controller has two such ports.
LINK LED
Glows green ( ) when link has been established.
ACT LED
Glows green ( ) when data is being sent and received.
PWC port
This is not used.
I
MPORTAN
T
• If a power failure lasts for more than 20ms, the SCU starts supplying
power, and the controller's cache data is copied to flash memory.
There is no limit to the post-failure data retention time.
• SCU failure will disable the cache function, leading to degraded
performance.