Why df shows different device size then LVM command in Red Hat Enterprise Linux?

Solution Verified - Updated -

Issue

df -h

Filesystem                      Size  Used Avail Use% Mounted on
/dev/mapper/datavg-datalv        26G  1.1G   21G   5%   /data

lvs

  LV           VG               Attr            LSize   Pool 
 datalv    datavg             -wi-ao----       64.90G

Environment

  • Red Hat Enterprise Linux

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