DIMM modules
Isilon IQ nodes contain eight DIMM slots on the node motherboard.
General ESD guidelines
Always follow electrostatic discharge (ESD) prevention procedures when removing and replacing cards, memory, and other
system components. You must use a wrist strap, attached to the node chassis, for grounding.
Required hardware
•
Replacement DIMM module
•
ESD grounded wrist strap
•
#2 Phillips screwdriver or #2 JIS driver
Replacing a DIMM module
If a DIMM module fails, replace it to allow the node to return to normal operation.
1. Open a secure shell (SSH) connection to the node on which the error was reported.
2. If you do not already know which DIMM module needs to be replaced, run the
isi_dmilog
command.
The system displays information similar to the following example output:
Log:
03/28/10 10:18:13 CDT Correctable ECC memory error: 1 time on DIMM1A
03/28/10 10:18:13 CDT Non-PCI non-fatal error: 1 time on ich esi-pci
Totals:
1 of Non-PCI non-fatal error
1 of Correctable ECC memory error
This example output shows that there is an error with DIMM1A, which means that the DIMM module in slot 1A on
the motherboard needs to be replaced.
3. Run the following command to clear the DIMM error messages from the log:
isi_dmilog -c
4. If the cluster is running OneFS 5.5.1 or later, run the following command to ensure that the policy error will be
cleared upon DIMM replacement:
isi_dmilog -z all
Note: Failure to run this command may result in the error persisting after the DIMM module has been replaced.
5. Shut down the node by running the following command:
shutdown -p now
6. Unplug both power cables from the back panel of the node.
7. Remove the top panel from the node.
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