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.
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Troubleshooting and problem solving
