Dimms; Overview And Requirements; Requirements For Replacing Dimms; Replace Dimms - Fujitsu ETERNUS AB Series Hardware Maintenance Manual

DIMMs

You must replace a DIMM when a memory mismatch is present, or you have a failed DIMM.

Overview and requirements

Before you replace DIMMs, you need to be aware of certain requirements and considerations.

Requirements for replacing DIMMs

The DIMMs in your storage array are fragile. Improper handling can lead to damage to the DIMMs.
You can replace a DIMM for any AB6100 controller. You must verify the configuration of your AB6100 controller
to ensure the correct DIMM size is replaced.
Follow these rules to avoid damaging the DIMMs in your storage array:
• Prevent electrostatic discharge (ESD):
• Keep the DIMM in the ESD bag until you are ready to install it.
• Open the ESD bag by hand or cut the top off with a pair of scissors. Do not insert a metal tool or knife
into the ESD bag.
• Keep the ESD bag and any packing materials in case you must return a DIMM later.
Warning: Always wear an ESD wrist strap grounded to an unpainted surface on your storage
enclosure chassis.
• Handle DIMMs carefully:
• Always use two hands when removing, installing, or carrying a DIMM.
• Never force a DIMM into a shelf, and use gentle, firm pressure to completely engage the latch.
• Always use approved packaging when shipping DIMMs.
• Avoid magnetic fields:
• Keep DIMMs away from magnetic devices.
This section describes how to replace a DIMM in the following controller shelves:
• AB6100 controller shelf

Replace DIMMs

To replace your DIMM you must verify the cache size of your controller, place the controller offline, remove the
controller, remove the DIMMs, and install the new DIMMs in your controller. Then you can bring your controller
back online and verify the storage array is working properly.

Determining if you need to replace DIMMs in a controller

You must verify the cache size of your controller before replacing the DIMMS.
Procedure
1. Access the Storage-Array-Profile for the controller.
a) Select Support Page > Support Resources > Storage Array Profile.
2. Select the Data Cache Module tab and locate the Data Cache Module field.
3. If one of the following is present, note the DIMM's location and continue with remaining procedures in this
section to replace the DIMMs on your controller:
• A failed DIMM, or a DIMM reporting Data Cache Module as not optimal.
• A DIMM with a mismatched Data Cache Module capacity.
| DIMMs |
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