Reinstalling The Controller Module - Lenovo ThinkSystem DM3000 series Hardware Installation And Maintenance Manual

– If power is lost without a clean shutdown, the NVMEM LED flashes until the destage is
complete, and then the LED turns off.
– If the LED is on and power is on, unwritten data is stored on NVMEM. This typically occurs
during an uncontrolled shutdown after ONTAP has successfully booted.
Step 3. Locate the NVMEM battery in the controller module.
Step 4. Locate the battery plug and squeeze the clip on the face of the battery plug to release the plug from
the socket, and then unplug the battery cable from the socket.
Step 5. Remove the battery from the controller module and set it aside.
Step 6. Remove the replacement battery from its package.
Step 7. Loop the battery cable around the cable channel on the side of the battery holder.
Step 8. Position the battery pack by aligning the battery holder key ribs to the "V" notches on the sheet
metal side wall.
Step 9. Slide the battery pack down along the sheet metal side wall until the support tabs on the side wall
hook into the slots on the battery pack, and the battery pack latch engages and clicks into the
opening on the side wall.
Step 10. Plug the battery plug back into the controller module.

Reinstalling the controller module

After you replace components in the controller module, reinstall it into the chassis.
Step 1. If you are not already grounded, properly ground yourself.
Step 2. If you have not already done so, replace the cover on the controller module.
Step 3. Align the end of the controller module with the opening in the chassis, and then gently push the
controller module halfway into the system.
Note: Do not completely insert the controller module in the chassis until instructed to do so.
Step 4. Recable the system, as needed. If you removed the media converters (SFPs), remember to reinstall
them if you are using fiber optic cables.
Step 5. Complete the reinstallation of the controller module by performing these steps:
The controller module begins to boot as soon as it is fully seated in the chassis. Be prepared to
interrupt the boot process.
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ThinkSystem DM3000x and DM5000x Hardware Installation and Maintenance Guide