ESM Canister - Loss of Communication

What Caused the Problem?

Communication has been lost to one of the dual ESM canisters in a drive enclosure. The drive enclosure has only one I/O path available. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

Caution
Electrostatic discharge can damage sensitive components. Use a grounding wrist strap or other anti-static precautions before removing or handling components.

Important Notes

Recovery Steps

1

Fix any other problems reported by Recovery Guru before attempting to fix this problem.

2

To determine the non-working channel, start at the drive minihub on the controller enclosure corresponding to the working channel (refer to the labels on the back of the controller enclosure if needed).

3

Trace the cable from the working channel to the working ESM canister in the affected drive enclosure.

Caution
Do not disconnect any cables on the working channel. Doing so will cause data loss!

4

Locate the other ESM canister in the affected drive enclosure (this is the canister on the non-working channel).

5

Reseating the ESM canister on the non-working channel may clear the failure being reported. While the cables are still connected, remove the canister from the drive enclosure, wait 10 seconds, and re-insert the canister firmly. Wait 40 seconds, then select Recheck to rerun the Recovery Guru to ensure the failure has been fixed.

If

Then

The problem has been fixed

You are finished with this procedure.

The problem has not been fixed

Go to step 6.

6

If...

Then...

The cable is connected directly to the ESM canister on the non-working channel

Remove the cable.

Go to Step 7.

The cable is connected to an interface transceiver such as a GBIC or SFP

Leave the cable connected and remove the interface transceiver from the ESM canister.

Go to Step 7.

7

Replace the ESM canister on the non-working channel. Verify the new canister has the same enclosure ID as the failed ESM canister.

8

Reconnect the cable or interface transceiver to the replaced ESM canister. Wait 40 seconds, then go to Step 9.

9

Select Recheck to rerun the Recovery Guru to ensure the failure has been fixed.

If

Then

The problem has been fixed

You are finished with this procedure.

The problem has not been fixed

Contact your technical support representative.