Verifying Component Operation; Completing The Component Installation Process; Verify Front Panel Leds; Using Leds - Dell EMC ME4 Series Owner's Manual

3 Cam the module home by manually closing the PCM handle. You should hear a click as the latch handle engages and secures the PCM
to its connector on the back of the midplane.
4 Connect the power cable to the power source and the PCM.
5 Secure the strain relief bales.
6 Using the management interfaces (the ME Storage Manager or CLI), verify whether the health of the new PCM is OK. Verify that the
green PCM OK LED is on/blinking per
Ops panel states show no amber module faults.
7 If replacing two PCMs, repeat steps 1 through 5.

Completing the component installation process

This section provides a procedure for ensuring that the components installed in the replacement controller enclosure chassis function
properly.
1 Reconnect data cables between devices, as needed, to return to the original cabling configuration:
• Between cascaded storage enclosures.
• Between the controller and peripheral or SAN devices.
• Between the controller enclosure and the host.
2 Reconnect power cables to the storage enclosures.

Verifying component operation

1 Restart system devices by moving the power switch on the power supply to the On position in the following sequence:
a Expansion enclosures first.
b Controller enclosure next.
c Data host last (if powered down for maintenance purposes).
Allow time for each device to complete its Power On Self Tests (POST) before proceeding.
2 Perform a rescan to force a fresh discovery of all expansion enclosures connected to the controller enclosure. This step clears the
internal SAS layout information, reassigns enclosure IDs, and ensures the enclosures are displayed in the proper order. Use the CLI or
ME Storage Managerto perform the rescan:
To perform a rescan using the CLI, enter the following command: rescan
To perform a rescan using the ME Storage Manager:
a Verify that both controllers are operating normally.
b In the System topic, select Action > Rescan Disk Channels.
c Select Rescan.

Using LEDs

This section describes the LEDs used to verify component operation. These LEDs are located on the enclosure front and rear panels.

Verify front panel LEDs

Front panel LEDs reside on the Ops panel located on the left ear flange. Disk LEDs are located on the carrier modules.
• Verify that the System Power On/Standby LED is illuminated green, and that the Module Fault LED is not illuminated.
• Verify that the enclosure ID LED located on the left ear is illuminated green.
• Verify that the disk module's LED is green or blinking green, and is not amber.
Table 11. PCM LED states. Verify that cooling fans are spinning with no fail states. Verify that
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