Nexsan Nexsan Unity, Hardware Maintenance Manual

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10. Re-secure the extraction handle retaining bolt. See Replacing a Unity Storage System controller on
page 54.
11. Replace all cables on the new controller.
Notes: Be sure to put all cables back into the proper ports. See Step 4 under System sub-components
on page 41.
If the controller does not automatically start up, select it in Unity and click the Turn On button in its
Properties panel at the bottom of the screen.
12. Verify that the new fan is working using the sensors command in the command-line interface (CLI). See
Accessing the nxadmin CLI and Using the nxadmin CLI’s command-based shell in the Nexsan Unity CLI
Reference Guide .
13. Migrate the resources back to the controller you removed using Unity. See Moving Cluster Resources in
the Nexsan Unity Software User Guide .
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To replace a lower layer fan 2 or 3 (Unity 2200 or Unity 2200X):
1. Perform the component identification and controller removal steps under System sub-components on
page 41.
2. Remove Upper Layer Fan 1, but do not detach it from power (see Replacing a fan on page 43, far left
photograph). Set it aside.
3. If necessary, unscrew the fan bracket from the back of the controller and remove it.
Figure 2-17: Removing the fan bracket
4. Gently lift the fan from its slot.
Figure 2-18: Removing Primary Fan 2 or 3
Chapter 2: Customer Replaceable Units: Class 2
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