Updated January 19, 2017
This article overviews why volume information displayed in the web console is different from what the Linux machine displays.
SAM 6.3 and later
By default, newly created file systems will be created with 5% of the space allocated for root.
SolarWinds does not recognize the 5% reserved space as part of the drive, which is why the volume size might differ from the size output from a df -kh command on the target Linux machine.
If the volume discrepancy is greater than 5% on volume size or the used space difference displayed in the web console is greater than 2%, open up a case with support including screenshots of the Vvolume information in the web console and the volume information output from both the df -Ta and df -kh command on the target Linux machine.
Volume information displayed in the web console is displayed by parsing the output of the df -Ta command, skipping items with undefined or zero size.
In conclusion, SolarWinds does not recognize the reserved space on those volumes which is why there is a difference.
Refer to the following feature request for SolarWinds to take the reserved space into account:
For more information on the reserved space on Linux machines:
Reduce the space reserved for root on an ext2, ext3 or ext4 filesystem (© 2010-2016 Graham Shaw, Inc., available at http://www.microhowto.info/, obtained on January 19, 2017.)
Monitor with the Orion Agent for Linux (informational):
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