If The Enclosure Does Not Initialize; Correcting Enclosure Ids; Troubleshooting Hardware Faults - Dell PowerVault ME5 Series Owner's Manual

Thermal considerations
Thermal sensors in the 5U84 enclosure and its components monitor the thermal health of the storage system.
NOTE:
● Exceeding the limits of critical values will activate the over-temperature alarm.
● For information about 5U84 enclosure alarm notification, see

If the enclosure does not initialize

It may take up to two minutes for all enclosures to initialize.
If an enclosure does not initialize:
● Perform a rescan
● Power cycle the system
● Make sure that the power cord is properly connected, and check the power source to which it is connected
● Check the event log for errors

Correcting enclosure IDs

When installing a system with expansion enclosures attached, the enclosure IDs might not agree with the physical cabling order.
This issue occurs if the controller was previously attached to enclosures in a different configuration, and the controller attempts
to preserve the previous enclosure IDs.
To correct this condition, ensure that both controllers are up, and perform a rescan using the PowerVault Manager or the CLI.
The rescan reorders the enclosures, but it can take up to two minutes to correct the enclosure IDs.
NOTE: Reordering expansion enclosure IDs only applies to dual-controller mode. If only one controller is available, due to a
controller failure, a manual rescan does not reorder the expansion enclosure IDs.
1. To perform a rescan using the PowerVault Manager:
a. Verify that both controllers are operating normally.
b. Select Maintenance > Hardware.
c. Select Actions > Rescan All Disks
d. Click Rescan.
2. To perform a rescan using the CLI, type the following command:
rescan

Troubleshooting hardware faults

Make sure that you have a replacement module of the same type before removing any faulty module.
NOTE: If the enclosure system is powered up and you remove any module, replace it immediately. If the system is used with
any modules missing for more than a few seconds, the enclosures can overheat, causing power failure and potential data
loss. Such action can invalidate the product warranty.
NOTE: Observe applicable/conventional ESD precautions when handling modules and components. Avoid contact with
midplane components, module connectors, leads, pins, and exposed circuitry.
Isolating a host-side connection fault
During normal operation, when a controller module host port is connected to a data host, the port host link status/link activity
LED is green. If there is I/O activity, the host activity LED blinks green. If data hosts are having trouble accessing the storage
system, but you cannot locate a specific fault or access the event logs, use the following procedures. These procedures require
scheduled downtime.
NOTE: Do not perform more than one step at a time. Changing more than one variable at a time can complicate the
troubleshooting process.
40 Troubleshooting and problem solving
5U alarm conditions.