Identify Fault Conditions; Figure 51 Controller Module Leds To Examine For Fault Conditions - Seagate Exos CORVAULT Hardware Installation And Maintenance Manual

Item LED
1 OK to remove
2 Hardware fault
3 SAS host port fault

Figure 51 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.
l
The OK to remove LED on the CM is off.
l
The Hardware fault LED for one of the four 12Gb SAS ports on the CM is steady or flashing amber.
l
The Fault-Rear panel LED on the storage enclosure front panel is steady amber.
l
Troubleshooting indicates a problem with the CM. When you are isolating connectivity or disk drive fault conditions,
l
stop the data flow to the affected disk groups from all hosts as a data protection precaution and perform a backup of
your data.
When all of the prior LED fault conditions occur simultaneously, it is a clear indication of component failure.

Identify fault conditions

Fault conditions do not necessarily cause the storage enclosure to cease functioning. Fault conditions do require a
system administrator to take an appropriate action to clear the fault condition.
The controller modules allow you to choose from multiple fault isolation methods. This section provides the basic
methodology used to locate faults within a storage system, then identify the affected FRUs.
When performing fault isolation and troubleshooting steps, select the option or options that best suit your site
environment. Use of any one of the following options is not mutually exclusive to the use of another option. The order
for the options is based on frequency of use.
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, not a fault
Chapter 6 Hardware installation and configuration issues
57