Cause; Resolution; I2C Bus Taken By Second System - Sun Microsystems SPARC Enterprise T5120 Installation And Service Manual

Caution – Boats in the same I/O Box are not allowed to be connected to different
servers. There is a potential of data corruption in FRUID SEEPROMs on the
centerplane and the power supplies.
D.6.8.1

Cause

The boats are connected to two different systems.
■
I2C failures prevent detecting the downlink card in the host.
■
Corrupted FRUID contents in the centerplane chassis prevent software from
■
identifying the correct I/O Box chassis.
D.6.8.2

Resolution

Verify that both boats are connected to the same server. The boats can be
■
configured into different domains on the same server, but the boats must be
managed by the same service processor. Both servers will attempt to update the
same FRUID data, potentially causing data corruption of FRUID records in the
centerplane and power supplies.
Inspect the host system to see which add-in slots contain link cards. Verify that
■
software correctly detects the link cards. If a link card is present and powered on,
but not seen by software, there may be problems with the I2C bus going to this
slot. Replace link card or move link card to a different slot.
If a boat is present, but the I/O Box instance number is not a 4-character value, the
■
software could not read the ManR serial number info. The box identifier would
look something like "IOX@?0".
D.6.9

I2C Bus Taken by Second System

The DEMUX detects and reports if the master path through the DEMUX is changed
unexpectedly.
Caution – Boats in the same I/O Box are not allowed to be connected to different
servers. There is a potential of data corruption in FRUID SEEPROMs on the
centerplane and the power supplies.
D.6.9.1 Cause
The boats are connected to two different systems.
■
D-16 External I/O Expansion Unit Installation and Service Manual for SPARC Enterprise T5xxx Servers • April 2011