4. Collect support data for your storage array using SANtricity System Manager.
If a problem occurs when you remove a controller, you can use the saved file to troubleshoot the issue. The
system will save inventory, status, and performance data about your storage array in a single file.
a.
Select Support
› Support Center › Diagnostics.
b. Select Collect Support Data.
c. Click Collect.
The file is saved in the Downloads folder for your browser with the name, support-data.7z.
5. Ensure that no I/O operations are occurring between the storage array and all connected hosts. For
example, you can perform these steps:
◦ Stop all processes that involve the LUNs mapped from the storage to the hosts.
◦ Ensure that no applications are writing data to any LUNs mapped from the storage to the hosts.
◦ Unmount all file systems associated with volumes on the array.
The exact steps to stop host I/O operations depend on the host operating system and
the configuration, which are beyond the scope of these instructions. If you are not sure
how to stop host I/O operations in your environment, consider shutting down the host.
Possible data loss — If you continue this procedure while I/O operations are occurring,
you might lose data.
6. Wait for any data in cache memory to be written to the drives.
The green Cache Active LED on the back of the controller is on when cached data needs to be written to
the drives. You must wait for this LED to turn off.
7. From the home page of SANtricity System Manager, select View Operations in Progress.
8. Confirm that all operations have completed before continuing with the next step.
9. Turn off both power switches on the controller shelf.
10. Wait for all LEDs on the controller shelf to turn off.
11. Select Recheck from the Recovery Guru, and confirm that the OK to remove field in the Details area
displays Yes, indicating that it is safe to remove this component.
Data on the storage array will not be accessible until you replace the controller canister.
Step 2: Remove failed controller (simplex)
Replace the failed canister with a new one.
Step 2a: Remove controller canister (simplex)
Remove a controller canister.
Steps
1. Put on an ESD wristband or take other antistatic precautions.
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