The two PSU status LEDs light up green to indicate that the unit is functioning properly and supplying
power to the unit.
7. In the graphical user interface (GUI), go to the
Home
page and verify that the status bar for the new
Power Supply Unit is green. See the
Nexsan High-Density Storage User Guide
for more information.
Expansion Controllers
CAUTION
: Computer components and disk drives are sensitive to electrostatic discharge (ESD).
Always ground any electrostatic charge from your person before touching components with your
hands or with any tools. Always use an anti-static wrist strap (one ships with each Nexsan Storage
System) while installing or performing maintenance on any Nexsan Storage System. See
on page 12 for detailed instructions.
Note
If an Expansion Controller fails or is removed, the RAID Controller on the main unit that it is connected
to passes control of the expansion units to the other RAID Controller.
This is normal behavior.
After the
Expansion Controller is replaced, you can re-establish the proper control paths through the graphical user
interface (GUI).
In the event of an Expansion Controller failure, replace the controller using the following procedure:
CAUTION
: DO NOT REMOVE THE FAILED EXPANSION CONTROLLER until the new Expan-
sion Controller has arrived and is ready to be installed. Removing a Controller reduces air flow and
cooling and can result in the system overheating.
►
To replace an expansion controller:
1. Determine which RAID Controller has failed by examining the
STAT
LED on each module (see
on page 4). A flashing red LED indicates the failed unit. The
Home
page of the graphical user
interface (GUI) also tells you which unit has failed (see the
Nexsan High-Density Storage User Guide
).
Note
In some cases, an Expansion Controller needs to be replaced even if it has not failed outright. In
this case, you must determine which Expansion Controller to replace by following the troubleshooting
procedures in
Chapter 4
of the
Nexsan High-Density Storage User Manual
.
2. Remove the SAS cables from the failed Expansion Controller.
3. Press the spring lock tab away from the edge of the controller, then carefully remove the controller from
the unit. Support the weight of the controller with your free hand while removing it.
Figure 3-3: Removing the Expansion Controller
EXP 0
EXP 1
L1
STAT
L0
EXP 0
EXP 1
L1
L0
4. Make sure that the replacement Expansion Controller is right side up. The spring lock tab should be on
the right.
Chapter 3: Replacing Modules
Nexsan E48X and Nexsan E60X
FRU Removal and Replacement Guide
Nexsan
17
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