One or more ESM canisters have failed in a drive enclosure. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.
1 |
If... |
Then... |
You see logical drive failures, channel failures or unassigned drive failures associated with the drive enclosure reporting the failed ESM canister |
Contact your technical support representative.
Caution
Recovery from a failed ESM canister with associated logical drive and drive failures is a complicated procedure that if done incorrectly, could result in the loss of data. Therefore, you should not attempt to perform any recovery steps without the help of your technical support representative.
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You Do Not see logical drive failures, channel failures or unassigned drive failures associated with the drive enclosure reporting the failed ESM canister
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Go to step 2. |
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2 |
Did you recently change any option or ID switches on the ESM canister without cycling power on the controller enclosure?
If... |
Then... |
No |
Go to step 3. |
Yes |
Stop all I/O to the controller enclosure. Turn the power switches off and then on again on the back of the controller enclosure, then go to step 10. |
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3 |
Check to make sure there is power to the drive enclosure and that the external drive cables are secure.
Caution
Disconnecting drive enclosure cables while I/O is in progress can cause data loss!
If... |
Then... |
The power and drive cables are OK |
Go to step 4. |
There is a problem with the power or cables |
Correct the problem, then go to step 10. |
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4 |
Perform the following steps to identify the failed ESM canister:
Caution
Make sure you correctly identify the failed canister. If you have two canisters, removing the remaining optimal canister while I/O is in progress can cause data loss!
a
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Select the affected enclosure's drive enclosure components button in the Physical View of the Subsystem Management Window. |
b
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Select the ESM canister button in the drive enclosure component's window. |
c |
If... |
Then... |
The ESM canister location is unknown
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Contact your technical support representative to determine the location of the failed ESM canister. Once you have identified the failed ESM canister, go to Step 5. |
There is only one ESM canister associated with the enclosure |
Go to Step 6. |
There are two ESM canisters associated with the enclosure and their locations are known |
Looking at the ESM canisters from the back of the drive enclosure, use the location information to identify the failed ESM canister.
Go to Step 5.
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5 |
Fix any loss of redundancy problems reported by Recovery Guru before going to Step 6. |
6 |
Reseating the ESM canister may clear the failure being reported. While the cables are still connected to the canister, 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... |
No failures are reported |
You are finished with this procedure. |
A failed ESM canister is still reported |
Go to Step 7. |
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7
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If...
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Then...
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The cables are connected directly to the ESM canister
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Remove the cables. Label each cable to ensure that they are properly reconnected when the ESM canister is replaced.
Go to Step 8.
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The cables are connected to an interface transceiver such as a GBIC or SFP
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Leave the cables connected and remove the interface transceivers from the ESM canister. Label each interface transceiver to ensure that they are properly reconnected when the ESM canister is replaced.
Go to Step 8.
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8 |
Replace the failed ESM canister. If both canisters have failed, replace both of them. Make sure the replacement canister(s) have the same switch settings as the failed canister(s).
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9
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Using the labels created in Step 7, reconnect the cables to the replaced canister(s). Wait 40 seconds, then go to Step 10.
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10 |
Select Recheck to rerun the Recovery Guru to ensure the failure has been fixed.
If... |
Then... |
No failures are reported |
You are finished with this procedure. |
A failed ESM canister is still reported |
- Review steps 2 and 3, correct any problems, and repeat step 10.
- Stop all I/O to the storage subsystem, turn the power switches off and on again on the back of the controller enclosure, and repeat step 10.
- Contact your technical support representative.
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