if you want to compression big VM image file into sparse file
use -S option
tar -Sczvf OVM.tgz OVM_OL5U7_X86_64_PVM_10GB
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if you want to compression big VM image file into sparse file
use -S option
tar -Sczvf OVM.tgz OVM_OL5U7_X86_64_PVM_10GB