OT - Offline uncorrectable sectors

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I have few disk that have offline uncorrectables sectors;

I found on this page how to identify the sectors and force a write on them to
trigger the relocation of bad sectors on the disk:

http://smartmontools.sourceforge.net/BadBlockHowTo.txt

My question is:

since I'm too lazy to follow all the procedure, do you think that a force
rewrite of the full disk would work?

Eg. "dd if=/dev/sda pf=/dev/sda bs=512"

Shoudl this be done at runlevel 1 or offline or I can do it without too many
worries, since I'm reading and rewriting the same data on the disk?

TIA and sorry for the OT

Lorenzo Quatrini
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