Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Problem Resolution Sure Solution 1006508.1 : Sun Fire[TM] V1280/E2900/3800/48x0/E4900/6800/E6900: Prtdiag and showboard display wrong cpu speed.
PreviouslyPublishedAs 209106 Symptoms Prtdiag and showboard display wrong cpu speed on a Sun Fire[TM] Serengeti domain: --------------------------- --------------------------- Resolution During POST, platform system clock sets the CPU speeds on a 'per-CPU' basis. The system clock is provided by the MAIN SC. If system clock, for some reason, is skewed out of tolerance, an incorrect CPU speed will be programmed. The data might seem to indicate that the CPU is defective, so replacing the System Board might seem to be the correct action. In fact, root cause is the system clock source, the MAIN SC. Follow the instructions in the Temporary Workaround section of this article to resolve this issue. Relief/Workaround - CPU speed is set correctly then the former MAIN SC should be replaced. Please schedule service to replace the faulty hardware by contacting your local Sun Service representative and providing this document ID as a reference. Additional Information The log files and data (See Problem Section) indicate that the CPU is Root Cause to this event, perhaps misleading some to think the System Board (CPU) is the prime suspect. CR 6325921 will change this messaging to indicate the accurate suspect, the SC (Scheduled for ScApp 5.20). Contact your local Sun Service representative with any questions on this information. Product Sun Fire V1280 Server Sun Fire 4800 Server Sun Fire 4810 Server Sun Fire 6800 Server Sun Fire E2900 Server Sun Fire E4900 Server Sun Fire E6900 Server Sun Fire 3800 Server Internal Comments The system clock is derived from two clock sources on the System controllerand an average is derived from both clocks. This clock average is then being tested twice during post and the value sampled will be used as CPU speed.
To test this, contact PTS to get assistance to understand and run
Unit Test
To inject an error
As the message indicates a CPU failure, you might be tempted to replace the
Corrective action is to fail over to the other system controller and replace Clock, System Controller CPU speed Previously Published As 83099 Change History Date: 2005-11-17 User Name: 83246 Action: Update Canceled Comment: *** Restored Published Content *** none Version: 0 Date: 2005-11-08 User Name: 83246 Action: Update Started Comment: check Version: 0 Date: 2005-11-04 User Name: 31620 Action: Approved Comment: See history for details of this article. All necessary things in place now. Andy MacBain Attachments This solution has no attachment |
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