Asset ID:	1-72-1012603.1
Update Date:	2009-02-15
Keywords:

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Solution Type  Problem Resolution Sure

Solution  1012603.1 :   Sun StorEdge[TM] 3000 series array: controller panic with message "WARNING: BBU cached data error!"  


PreviouslyPublishedAs
217345

Symptoms
When an incorrect procedure is used on an array(like upgrading from 3.xx to 4.xx
on a live system), it may lead the controller to panic continously, with the
following error:

  "WARNING: BBU cached data error".  

This error is only visible by the serial connection.

Resolution
This error indicates that the CPU of the controller cannot use the cached data,
because the structure of the cache from 3.xx Firmware(FW) cannot be used with the
new FW release. As mentioned in the README file of the patch, it is required to
stop all I/Os.
To recover, disconnect the Battery of the impacted controller, and wait a couple
of minutes, so that the cache memory loses the stored data. The controller will
boot correctly, after the battery reconnection.

Unfortunately, since the cached data are lost, you may have to restore the data
into all the LD's.

Product
Sun StorageTek 3511 SATA Array
Sun StorageTek 3510 FC Array
Sun StorageTek 3310/3510/3511 Firmware 4.11 Upgrade
Sun StorageTek 3310 SCSI Array

Internal Comments
For internal Sun use only.

-PDE confirm that it is not normally linked to a firmware upgrade or new

functions in 4.11. Actually, we are most likely seeing one of the random

problems that occurs when the correct procedure is not followed

cached data error, controller, panic
Previously Published As
82865

Change History
Date: 2005-10-27
User Name: 18392
Action: Approved
Comment: Added product name, product noun, trademarking, did some re-wording and formatting for clarity and readability.
Version: 4
Date: 2005-10-27
User Name: 18392
Action: Accept
Comment:
Version: 0
Date: 2005-10-27
User Name: 71772
Action: Approved
Comment: Looks good.
Version: 0

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