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Sun Fire[TM] Servers (3800/4800/4810/6800/E4900/E6900): I2C communication problem (Doc ID 1005071.1)

Last updated on APRIL 20, 2021

Applies to:

Sun Fire V1280 Server - Version All Versions and later
Sun Netra 1280 Server - Version All Versions and later
Sun Fire 3800 Server - Version All Versions and later
Sun Fire 4800 Server - Version All Versions and later
Sun Fire 4810 Server - Version All Versions and later
All Platforms

Symptoms

How to resolve an I2C communication problem on Sun Fire [TM] Midrange Servers.

On Sun Fire[TM] Midrange servers, a message similar to the following is noted in the System Controller (SC) logs (showlogs file) and indicates an i2c communication problem:

 In the example above, the indication is that the I2C communication is broken between the Main SC and System Board (SB) 0.  Your error message might be between the SC and any number of devices (SB, IB, RP, etc).

Changes

 Any Recent System Maintenance should be considered as possibly causing i2c issues.

Cause

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