Diagnostic steps 49
NOTE: See “FDE considerations” (page 16) and Figure30 (page65).
Is a connected host port Host Link Status LED off?
Is a connected port Expansion Port Status LED off?
Yes, and the
Online/Activity
LED is off.
The disk drive is offline. A predictive
failure alert may have been received for
this device.
• Check the event log for specific information regarding the fault.
• Isolate the fault.
• Contact an authorized service provider for assistance.
Yes, and the
Online/Activity
LED is blinking.
The disk drive is active, but a predictive
failure alert may have been received for
this device.
• Check the event log for specific information regarding the fault.
• Isolate the fault.
• Contact an authorized service provider for assistance.
Table 10 Diagnostics LED status: Front panel disks “Fault/UID” (continued)
Answer Possible reasons Actions
Table 11 Diagnostics LED status: Rear panel “Host Link Status”
Answer Possible reasons Actions
No System functioning properly. No action required (see Link LED note: page 69).
Yes The link is down. • Check cable connections and reseat if necessary.
• Inspect cables for damage. Replace cable if necessary.
• Swap cables to determine if fault is caused by a defective cable.
Replace cable if necessary.
• Verify that the switch, if any, is operating properly. If possible, test
with another port.
• Verify that the HBA is fully seated, and that the PCI slot is
powered on and operational.
• In the SMU, review event logs for indicators of a specific fault in a
host data path component. Follow any Recommended Actions.
• Contact an authorized service provider for assistance.
• See “Isolating a host-side connection fault” (page 51).
Table 12 Diagnostics LED status: Rear panel “Expansion Port Status”
Answer Possible reasons Actions
No System functioning properly. No action required.
Yes The link is down. • Check cable connections and reseat if necessary.
• Inspect cable for damage. Replace cable if necessary.
• Swap cables to determine if fault is caused by a defective cable.
Replace cable if necessary.
• In the SMU, review event logs for indicators of a specific fault in a
host data path component. Follow any Recommended Actions.
• Contact an authorized service provider for assistance.
• See “Isolating a controller module expansion port connection
fault” (page 53).
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