Owners Manual

Table 28. Removed events
Removed event Replacement event
154 237
155 237
Events sent as indications to SMI-S clients
If the storage system SMI-S interface is enabled, the system will send events as indications to SMI-S clients so that SMI-S
clients can monitor system performance.
The following event categories pertain to FRU assemblies and certain FRU components:
Table 29. FRU event categories
FRU/Event
category
Corresponding SMI-S class Operation status values that would trigger alert conditions
Controller
DHS_Controller Down, Not Installed, OK
Hard Disk Drive
DHS_DiskDrive Unknown, Missing, Error, Degraded, OK
Fan
DHS_PSUFan Error, Stopped, OK
Power Supply
DHS_PSU Unknown, Error, Other, Stressed, Degraded, OK
Temperature
Sensor
DHS_OverallTempSensor Unknown, Error, Other, Non-Recoverable Error,
Degraded, OK
Battery/SuperCap
DHS_SuperCap Unknown, Error, OK
FC Port
DHS_FCPort Stopped, OK
SAS Port
DHS_SASTargetPort Stopped, OK
iSCSI Port
DHS_ISCSIEthernetPort Stopped, OK
Using the trust command
Use the CLI trust command only as a last step in a disaster recovery situation.
Do not use the trust command if a disk group with a single disk is in a leftover or failed condition. The trust command may
cause permanent data loss and unstable operation of the disk group. Only use the trust command if the disk group is in an
Offline state.
A disk that has failed or is in a leftover state due to multiple errors should be replaced with a new disk. Assign the new disk back
to the disk group as a spare. Then allow reconstruction to complete to return the disk group to a fault tolerant state.
The trust command attempts to resynchronize leftover disks to make any leftover disk an active member of the disk group.
The trust command may be needed when a disk group is offline because there is no data backup. The trust command may
also be needed as a last attempt to recover the data on a disk group. In this case, the trust command may work, but only if
the leftover disk continues to operate. When the "trusted" disk group is back online, backup all data on the disk group and verify
all data to ensure it is valid. Then delete the trusted disk group, add a new disk group, and restore data from the backup to the
new disk group.
CAUTION:
Using trust on a disk group is only a disaster-recovery measure. The disk group has no tolerance
for another failure and should never be put back into a production environment. Before trusting a disk group,
carefully read the cautions and procedures for using the trust command in the Dell EMC PowerVault ME4 Series
Storage System CLI Reference Guide and online help. If you are uncertain whether to use this command, contact
technical support for assistance.
Once the trust command has been issued on a disk group, further troubleshooting steps may be limited towards disaster
recovery. If you are unsure of the correct action to take, contact technical support for further assistance.
Events and event messages
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