Deployment Guide

Table 27. 5U alarm conditions (continued)
Status Severity
Under-temperature alarm Fault – critical
I
2
C bus failure Fault – loss of redundancy
Ops panel communication error (I
2
C) Fault – critical
RAID error Fault – critical
SBB I/O module fault Fault – critical
SBB I/O module removed Warning
Drive power control fault Warning – no loss of drive power
Drive power control fault Fault – critical – loss of drive power
Insufficient power available Warning
For details about replacing modules, see the Dell EMC PowerVault ME4 Series Storage System Owner’s Manual.
NOTE: Use the PowerVault Manager to monitor the storage system event logs for information about enclosure-related
events, and to determine any necessary recommended actions.
Thermal considerations
NOTE:
Thermal sensors in the 5U84 enclosure and its components monitor the thermal health of the storage system.
● Exceeding the limits of critical values activates the over-temperature alarm.
● For information about 5U84 enclosure alarm notification, see 5U alarm conditions on page 82.
Fault isolation methodology
ME4 Series Storage Systems provide many ways to isolate faults. This section presents the basic methodology that is used to
locate faults within a storage system, and to identify the pertinent CRUs affected.
As noted in Using guided setup on page 33, use the PowerVault Manager to configure and provision the system upon completing
the hardware installation. Configure and enable event notification to be notified when a problem occurs that is at or above the
configured severity. See the Dell EMC PowerVault ME4 Series Storage System Administrator’s Guide for more information.
When you receive an event notification, follow the recommended actions in the notification message to resolve the problem.
Fault isolation methodology basic steps
● Gather fault information, including using system LEDs as described in Gather fault information on page 84.
● Determine where in the system the fault is occurring as described in Determine where the fault is occurring on page 84.
● Review event logs as described in Review the event logs on page 85.
● If required, isolate the fault to a data path component or configuration as described in Isolate the fault on page 85.
Cabling systems to enable use of the replication feature—to replicate volumes—is another important fault isolation
consideration pertaining to initial system installation. See Host ports and replication on page 91 and Isolating replication faults
on page 94 for more information about troubleshooting during initial setup.
Options available for performing basic steps
When performing fault isolation and troubleshooting steps, select the option or options that best suit your site environment.
Use of any option is not mutually exclusive to the use of another option. You can use the PowerVault Manager to check the
health icons/values for the system, or to examine a problem component. If you discover a problem, either the PowerVault
Manager or the CLI provides recommended-action text online. Options for performing basic steps are listed according to
frequency of use:
Troubleshooting and problem solving
83