Isolating A Host-Side Connection Fault - HP 2000i User Manual

Isolating a host-side connection fault

During normal operation, when a controller module host port is connected to a data host, the port's host
link status LED and host link activity LED are green. If there is I/O activity, the host activity LED blinks green.
If data hosts are having trouble accessing the storage system, and you cannot locate a specific fault or
cannot access the event logs, use the following procedure. This procedure requires scheduled downtime.
IMPORTANT:
can complicate the troubleshooting process.
1. Halt all I/O to the storage system.
2. Check the host activity LED.
If there is activity, halt all applications that access the storage system.
3. Reseat the cable and inspect for damage.
Is the host link status LED on?
• Yes – Monitor the status to ensure that there is no intermittent error present. If the fault occurs again,
clean the connections to ensure that a dirty connector is not interfering with the data path.
• No – Proceed to the next step.
4. Move the cable to a port with a known good link status.
This step isolates the problem to the external data path (host cable and host-side devices) or to the
controller module port.
Is the host link status LED on?
• Yes – You now know that the host cable, and host-side devices are functioning properly. Return the
cable to the original port. If the link status LED remains off, you have isolated the fault to the
controller module's port. Replace the controller module.
• No – Proceed to the next step.
5. Verify that the switch, if any, is operating properly. If possible, test with another port.
6. Verify that the HBA is fully seated, and that the PCI slot is powered on and operational.
7. Replace the HBA with a known good HBA, or move the host side cable to a known good HBA.
Is the host link status LED on?
• Yes – You have isolated the fault to the HBA. Replace the HBA.
• No – It is likely that the controller module needs to be replaced.
8. Move the cable back to its original port.
Is the host link status LED on?
• No – The controller module's port has failed. Replace the controller module.
• Yes – Monitor the connection for a period of time. It may be an intermittent problem, which can
occur with damaged cables and HBAs.
Do not perform more than one step at a time. Changing more than one variable at a time
HP StorageWorks 2000i G2 Modular Smart Array User Guide 53