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1.2.1
Memory Fault Handling
The server uses an advanced ECC technology, called chipkill, that corrects up to 4
bits in error on nibble boundaries, as long as all of the bits are in the same DRAM. If
a DRAM fails, the FB-DIMM continues to function.
The Predictive Self Healing (PSH) technology in the Solaris OS uses the fault
manager daemon (fmd) to watch for various kinds of faults. When a fault occurs, the
fault is assigned a unique fault ID (UUID), and logged. PSH reports the fault and
provides a recommended proactive replacement for the FB-DIMMs associated with
the fault.
If you suspect that the server has a memory problem, see
DIMMs" on page 3-14
instructions in that chapter to clear the faults and enable the replaced FB-DIMMs.
1.3
Using the Status Indicators to Identify
the State of Devices
The server provides status indicators in the upper left corner of the front panel
(
FIGURE 1-1
means of determining the state of the system or individual components.
1-4
Sun Netra X4450 Server Service Manual • August 2008
for FB-DIMM replacement instructions. You must perform the
) and on the rear panel (
). These indicators provide a visual
FIGURE 1-2
Section 3.5 "Replacing FB-
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