[CentOS] Utility to zero unused blocks on disk

Wes James

comptekki at me.com
Mon Feb 8 21:34:48 UTC 2016

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Is there a utility to zero unused blocks on a disk?

CentOS 6.7/Ext4

I saw zerofree, but I’m not sure it would work on Ext4 or even work on this version of CentOS.

thanks,

-wes

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