Figure 58 Controller Module Leds To Examine For Fault Conditions - Seagate Exos CORVAULT Hardware Installation And Maintenance Manual

11. Rotate the PSU handle to the closed position, listening for a slight click as the latch engages and secures the PSU.
12. If you are replacing both PSUs, repeat the entire process for the second PSU.
13. Verify all cables lie flat and smooth in the cable clip on the chassis, then connect the provided right-angle power
connector to the PSU.
14. Verify the PSU status LED is steady green and the cooling fans are spinning.
15. Return to the front panel of the storage enclosure and verify that the Fault-Rear panel LED is not steady amber.
Replace a controller module
The two (2) controller modules (CMs) manage the flow of data to and from the storage enclosure. Each CM provides a
very specialized, solutions-specific interaction that depends on your system configuration and software implementation,
including SAS zoning, failover and failback procedures, and multi-path procedures.
The CM has a number of ports, each with independent status LEDs. Those items in the state column with an asterisk (*)
indicate a fault condition.
Item LED Type
1 OK to remove
2 Hardware fault
3 SAS host port fault

Figure 58 Controller module LEDs to examine for fault conditions

Consult your solution service documentation for details on how to minimize system disruption during service
replacement of a controller module. Fault conditions include the following:
Logs or events indicate a fault condition for the CM.
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The OK to remove LED on the CM is off.
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The Hardware fault LED for one of the four 12Gb SAS ports on the CM is steady or flashing amber.
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The Fault-Rear panel LED on the storage enclosure front panel is steady amber.
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74 Chapter 7 In-service field maintenance
1 2
Color State
On
White
Off
On*
Amber
Off
On*
Amber
Flashing*
Off
3
Status
CM is safe to remove after successful shutdown
Active, not safe to remove CM
CM hardware fault
CM hardware is functioning properly
SAS connected; one or more SAS lanes inactive; partial link up
results in lower and inconsistent speed
SAS connected; one or more SAS lanes inactive; active lanes
register input or output activity
No host link connection