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Why are there Negative values in the free capacity column of the LUN report in AIQUM?

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Applies to

Active IQ Unified Manager 9.8

Answer

  • When downloading a Performance report for LUNs in Unified Manager, the Free Capacity column will show negative values.

  • This is expected behavior when the Used Size value is greater than the value in size (belonging to the original size of the LUN) 

  • Unified Manager will populate the reports available size as a result of  (Size) - (SizeUsed) = Free Capacity.

Example:
 
<CModeLUN UUID="xxxxxx-xxxx-xxxx-xxxxx-xxxxxxx" VolumeRef="VOL_TEST" VserverRef="SVM!" Path="/vol/vol_test/vol_test" IsOnline="true" Size="1869169767424" SizeUsed="1869605892096" IsSpaceReservationEnabled="false" IsSpaceAllocEnabled="false" IsMapped="true" SerialNumber="xxxxxxxxxxxx" MultiProtocolType="windows_2008" Alignment="ALIGNED" AlignmentRaw="aligned" PrefixSize="0" SuffixSize="0" Class="REGULAR" ClassRaw="regular" />

(Size="1869169767424") - (SizeUsed="1869605892096") = -436124672 (-0.406)

Additional Information

 

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