HP AA988A - Modular Smart Array Storage Controller SCSI User Manual page 65

4. Move the expansion cable to a port on the RAID enclosure with a known good link
status.
This step isolates the problem to the expansion cable or to the controller module's
expansion port.
Is the expansion port status LED on?
Yes – You now know that the expansion cable is good. Return cable to the
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original port. If the expansion port status LED remains off, you have isolated
the fault to the controller module's expansion port. Replace the controller
module.
No – Proceed to the next step.
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5. Move the expansion cable back to the original port on the controller enclosure.
6. Move the expansion cable on the drive enclosure to a known good expansion port
on the drive enclosure.
Is the expansion port status LED on?
Yes – You have isolated the problem to the drive enclosure's port. Replace the
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expansion module.
No – Proceed to Step 7.
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7. Replace the cable with a known good cable, ensuring the cable is attached to the
original ports used by the previous cable.
Is the host link status LED on?
Yes – Replace the original cable. The fault has been isolated.
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No – It is likely that the controller module needs to be replaced
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Chapter 5 Troubleshooting 65