Question about full server backups on Plesk

Hi,
Does anyone know if using the "--tar-ignore-failed-read"option
when doing a backup on plesk could lead to the whole backup becoming unusable (for example it would fail when I try to restore a backup). Or when I use that is it possible for only small parts of data to be lost or only certain sites or is it possible for the whole backup to become unusable? I am reffering to running the following command when backing up

/usr/local/psa/bin/psadump -F -f - --tar-ignore-failed-read --nostop > /backup/folder/

Anyone know?

 

 

 

 

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