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In this Document

Goal

Solution

References

Oracle Confidential PARTNER - Available to partners (SUN).
Reason: FRU replacement on Engineered system

Applies to:

Goal

 How to Replace Disk controller Super Capacitor assembly in Exadata X5-2/X6-2 Compute Node.

Solution

 DISPATCH INSTRUCTIONS
WHAT SKILLS DOES THE FIELD ENGINEER/ADMINISTRATOR NEED?: Exadata Trained

TIME ESTIMATE: 60 minutes
TASK COMPLEXITY: 3

FIELD ENGINEER/ADMINISTRATOR INSTRUCTIONS:
PROBLEM OVERVIEW: A faulty SuperCapacitor has been diagnosed and needs replacing.

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

The server that contains the faulty supercapacitor should have its services offline and system powered off.

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

The instructions below assume the customer DBA is available and working with the field engineer onsite to manage the host OS and
DB/ASM 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 DBA wants or allows or needs help with their steps.

Step A. Pre-Steps to shutdown the node for servicing:

1. For Extended information on this section, check MOS Note:
ID 1093890.1 Steps To Shutdown/Startup The Exadata & RDBMS Services and Cell/Compute Nodes On An Exadata Configuration.

For a documentation reference, in the Exadata Maintenance Guide, use the section of chapter 1 "General Maintenance Information"
titled "Non-Emergency Power Procedures" section "Powering Off Oracle Exadata Rack" sub-section "Powering off Database Servers" available on the customer's
cell server image in the /opt/oracle/cell/doc directory, or internal to Oracle here:
http://amomv0115.us.oracle.com/archive/cd_ns/E50790_01/doc/doc.121/e51951/general.htm#DBMMN21014

if running OVM then go to section "For Compute Node running OVM" - for non-OVM  proceed as follows:

Shutdown crs

i. As root user do the following to stop crs and disable autostart of crs on reboot:

where GI_HOME environment variable is typically set to “/u01/app/11.2.0/grid” but will depend on the customer's environment.
In the above output the “1” of “+ASM1” refers to the DB node number. For example, Db node #3 the value would be +ASM3.

ii. Validate CRS is down cleanly. There should be no processes running.

For Compute Node running OVM proceed as follows:

If there are any concerns engage EEST engineer.

The customer should perform the following:
(a) See what user domains are running (record result )
Connect to the management domain (domain zero, or dom0).
This is an example with just two domains and the management domain Domain-0

connect to each domain using the command

where domainname would be dm01db01vm01 or dm01db01vm02 if using the above examples.

Shut down any instances of crs ,refer to the example above in previous section "shutdown crs" in all user domains

Press CTRL+] to disconnect from the console.

(b)Shutdown all user domains from dom0

(c) See what user domains are running (should be only Domain-0)

(d) Disable user domains from auto starting during dom0 boot after Super Capacitor has been replaced.

Now proceed as follows for either for Compute Node running OVM" or non-OVM

3. 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 supercapacitor occurs. Set all logical volumes cache policy to WriteThrough cache mode:

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

4. The customer can now shutdown the server operating system:

Reference links for Service Manual:
X5-2 DB’s: ( http://docs.oracle.com/cd/E41059_01/html/E48312/napsm.html#scrolltoc )

4. The field engineer can now 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 (CMA). Ensure all customer-added data network cables are properly dressed
into the CMA Take care to ensure the cables and CMA is moving properly.
Remember to disconnect the power cords before opening the top of the server

Remove fan module FM0 (the left most fan viewing the server from the front).

Lift the super capacitor up to release the reclosable fasteners that secure it to the server's chassis

Disconnect the super capacitor cable from the super capacitor and remove the super capacitor.

Reverse the procedure to fit the new super capacitor

Server Services Startup Validation:

DB Node Startup:

After the OS is up, login as root and validate the physical and logical volumes are seen in the OS, and that the supercap is seen:

Set all logical drives cache policy to WriteBack cache mode:

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

CRS services should now be started.

"DB Node Startup Verification" - for compute node NOT running OVM ,for OVM refer to next section.

Startup CRS and re-enable autostart of crs. After the OS is up, the Customer DBA should validate that CRS is running. As root execute:

 where GI_HOME environment variable is typically set to “/u01/app/11.2.0/grid” but will depend on the customer's environment.
In the above output the “1” of “+ASM1” refers to the DB node number. For example, Db node #3 the value would be +ASM3.
Example output when all is online is:

Validate that instances are running:

It should return a record for the ASM instance and a record for each database.

For Compute Node running OVM

If the customer requires assistance please ask them to contact EEST engineer or parent case owner.

Once the compute node has booted ,re-enable user domains to autostart during Domain-0 boot.

Startup all user domains that are marked for auto start

See what user domains are running (compare against result from previously collected data)

if any not auto-started then Startup a single user domain

Check that crs has started in user domains, refer to previous section "DB Node Startup Verification"

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

Verify that HW Components and SW Components are returned to properly functioning state with server up and database services
operating on DB Servers

PARTS NOTE:

7086345 - Super Capacitor

REFERENCE INFORMATION:

1093890.1 Steps To Shutdown/Startup The Exadata & RDBMS Services and Cell/Compute Nodes On An Exadata Configuration.

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