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In this Document

Goal

Solution

References

Oracle Confidential PARTNER - Available to partners (SUN).
Reason: FRU CAP document

Applies to:

Goal

 How to Replace a Faulty RAID HBA Super Capacitor (SuperCAP) on BDA X5-2 or X6-2

Solution

DISPATCH INSTRUCTIONS WHAT SKILLS DOES THE FIELD ENGINEER/ADMINISTRATOR NEED?: BDA trained

TIME ESTIMATE: 60 minutes
TASK COMPLEXITY: 2

FIELD ENGINEER/ADMINISTRATOR INSTRUCTIONS:

PROBLEM OVERVIEW:
The disk controller super capacitor in a Big Data Appliance X5-2 or X6-2 Server node has been diagnosed as needing replacement.

WHAT STATE SHOULD THE SYSTEM BE IN TO BE READY TO PERFORM THE RESOLUTION ACTIVITY?:

The instructions below assume the Customer system administrator is available and working with the field engineer onsite to manage the host OS and BDA services.
They are provided here to allow the FE to have all the available steps needed when onsite, and can be done by the FE if the customer system administrator wants or allows or needs help with these steps.
The server that contains the faulty disk controller super capacitor should have its services offlined and system powered off.

Preparation for replacement:

1. If the OS is still operating and available, then revert all the RAID disk volumes to WriteThrough mode to ensure all data in the RAID cache memory is flushed to disk and not lost when replacement of the Super Capacitor occurs. Set all logical volumes cache policy to WriteThrough cache mode:

Verify the current cache policy for all logical volumes is now WriteThrough:

2. The Customer’s system administrator should shutdown the server node and BDA services following the shutdown instructions for Big Data Appliance detailed in MOS Note 2099858.1

WHAT ACTION DOES THE FIELD ENGINEER/ADMINISTRATOR NEED TO TAKE?:

Physical disk controller Super Capacitor replacement:

Reference links for Super Cap section in the Service Manual:
X5-2L : ( https://docs.oracle.com/cd/E41033_01/html/E48325/cnpsm.gocii.html )
X6-2L : ( https://docs.oracle.com/cd/E62172_01/html/E62184/gocii.html )

1. Slide out the server for maintenance.
    Do not remove any cables prior to sliding the server forward, or the loose cable ends will jam in the cable management arms.
    Take care to ensure the cables and Cable Management Arm is moving properly. Refer to Note 1444683.1 for CMA handling training.

2. Disconnect the AC power cords.

3. Unlatch and slide off the top cover of the server.

4. Disconnect the cable from the Super Capacitor. Grasp both ends of the Super Capacitor cable connector, press in on the release latch, and then unplug the connector.

5. The Super Capacitor is secured to the air baffle by a re-closeable fastener, which allows it to be easily removed and replaced.
    To separate the Super Capacitor from the air baffle, place your finger under the rear of the super capacitor and lift up.
    Place the removed Super Capacitor on an anti-static mat.

6. Apply a re-closeable fastener to the underside of the replacement super capacitor if necessary.

7. Align the re-closeable fastener on the Super Capacitor with the re-closeable fastener on the air baffle and press down to secure it.

8. Re-connect the Super Capacitor cable to the replacement Super Capacitor.

9. Install the top cover

10. Install the AC power cords

11. Slide the server back into the rack.

OBTAIN CUSTOMER ACCEPTANCE WHAT ACTION DOES THE FIELD ENGINEER/ADMINISTRATOR NEED TO TAKE TO RETURN THE SYSTEM TO AN OPERATIONAL STATE:

These should be done in co-operation with the customer’s administrator to complete the procedure and verification prior to the field engineer leaving the customer site.


1. Press the power button on the front of the server to power on the unit.

2. During boot, monitor the graphics console through either ILOM javaconsole or the local KVM.
  To connect to the console through ILOM:
  a. From the ILOM Web browser (preferred):
    Access the “Remote Control → Redirection” tab and then click on the “Launch Remote Console” button.
    (On ILOM 3.1.x systems, the console button can be launched from the initial Summary Information screen).
  b. From the ILOM CLI:

Watch in particular, the LSI controller BIOS while it is loading. If it gives a warning message regarding drives with preserved cache, then choose “D” to discard the cache and continue. This is not an issue as the disk will get re-synced after boot by HDFS. If it gives a warning message regarding drives are in write-through mode due to a low SuperCapacitor charge, then choose to continue.

The boot should continue normally after up to the login prompt.

Note if using the ILOM serial console to monitor the boot, there may be a long pause during subsequent boot steps before the login prompt displays, as the default console is the graphics, and portions of the boot messages will only go to the graphics screen and not display on the serial console.

3. Once full boot is completed you should be able to login as ‘root’ user and verify the new Super Capacitor is seen and is charging.

4. Set all logical drives cache policy to WriteBack cache mode:

5. Verify the current cache policy for all logical drives is now using WriteBack cache mode:

6. Once the hardware is verified as up and running, the Customer's system administrator will need to verify the BDA services are up following the startup procedures for Big Data Appliance detailed in MOS Note 2099858.1

PARTS NOTE:
7086345 13.5V 6.4F Super Capacitor

References

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