Manually zeroizing old data

1min

For each partition where you are not preserving existing data (where encrypted_preserve=n) and which previously held sensitive data, you should wipe the partition before encrypting it. Otherwise, some blocks might not be overwritten with encrypted data immediately and could be recovered.
Use the umount and wipefs commands to unmount and zeroize.
Shell
$ umount <partition name>
$ wipefs <partition name>
$ cat /dev/zero > <partition name>
$ umount <partition name>
$ wipefs <partition name>
$ cat /dev/zero > <partition name>
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For example, to zeroize partition /dev/sdb:
Shell
$ umount /dev/sdb
$ wipefs /dev/sdb
$ cat /dev/zero > /dev/sdb
$ umount /dev/sdb
$ wipefs /dev/sdb
$ cat /dev/zero > /dev/sdb
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Configure the inventory file

Install Zettaset XCrypt Full Disk