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Each X-Brick of the EMC XtremIO contains atleast one Battery Backup Unit (BBU). From the hardware perspective, no component is a single point of failure. Each Storage Controller, DAE and InfiniBand Switch in the cluster is equipped with dual power supplies. The cluster also has dual Battery Backup Units and dual network and data ports (in each of the Storage Controllers). Two InfiniBand Switches are cross connected and create a dual data fabric. Both the power input and the different data paths are constantly monitored, and any failure triggers a recovery attempt or failover.

The software architecture is built in a similar way. Every piece of information that is not committed to the SSD is kept in multiple locations, called Journals. Each software module has its own Journal, which is not kept on the same Storage Controller, and can be used to restore data in case of unexpected failure. Journals are regarded as highly important and always kept on Storage Controllers with battery backed up power supplies. In case of a problem with the Battery Backup Unit, the Journal fails over to another Storage Controller.

In case of global power failure, the Battery Backup Units ensure that all Journals are written to vault drives in the Storage Controllers and the cluster is turned off.

Administrators of large environments may not entertain frequent failure of the Battery Backup Units and may wish to be alerted proactively about the overall status of the Battery backup Unit and its functioning in detail. The XIOBBUsTest test helps administrators in this regard!

This test auto-discovers the Battery Backup Units of the target EMC XtremIO and for each BBU, reports the health, status and overload condition. This test also reports the input and output power supply to the BBUs, the battery charge etc. This way, this test helps the administrators proactively detect defective batteries and help them in removing and replacing such batteries, so as to ensure service continuity.

Outputs of the test : One set of results for each Battery Backup Unit of the target EMC XtremIO being monitored.

Measurement

Description

Measurement Unit

Interpretation

enabledState

Indicates whether/not this BBU is enabled.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Yes	0
No	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not this BBU is enabled. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

lifeCylState

Indicates the current health of this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Healthy	0
Initializing	1
Uninitialized	2
Failed	3
Disconnected	4

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current health of this BBU. The graph of this measure however is represented using the numeric equivalents only - 0 to 4.

isBypassActive

Indicates whether/not the infiniband switch bypass is active on this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Yes	0
No	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not the infiniband switch bypass is active. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

isLowBatteryRunTime

Indicates whether/not low battery runtime has been detected on this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Yes	0
No	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not low battery runtime has been detected on this BBU. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

isUpsOverload

Indicates whether/not this BBU is overloaded.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Yes	0
No	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not this BBU is overloaded. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

outlet1Status

Indicates the current state of power output from outlet 1 of this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
On	0
Off	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current state of power output from outlet 1. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

outlet2Status

Indicates the current state of power output from outlet 2 of this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
On	0
Off	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current state of power output from outlet 2. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

outPutCurrent

Indicates the output current of this BBU.

Amps

outPutFrequency

Indicates the output frequency of this BBU.

outPutVoltage

Indicates the output voltage of this BBU.

Volts

realPower

Indicates the amount of power utilized by this BBU.

Watts

upsBatrChargePerc

Indicates the remaining battery charge of this BBU.

Percentage

upsConnState

Indicates the current status of the control connection between the Storage Controller and this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Connected	0
Disconnected	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current status of the control connection between the storage controller and the BBU. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

upsInput

Indicates the current state of the external power feed of this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
On	0
Off	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current state of the external power feed of this BBU. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.

upsLoadPerc

Indicates the current load on this BBU.

Percentage

upsLoadPercLevel

Indicates the current change in the load level of this BBU.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
OK	0

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current change in the load level of this BBU. The graph of this measure however is represented using the numeric equivalents only i.e., 0.

upsBatteryRepalce

Indicates whether/not the battery of this BBU needs replacement.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value	Numeric Value
Yes	0
No	1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not the battery of this BBU needis replacement. The graph of this measure however is represented using the numeric equivalents only - 0 or 1.