CentOS - Aug 2008 - OT - Offline uncorrectable sectors

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

Lorenzo Quatrini wrote:
> I have few disk that have offline uncorrectables sectors;
Ideally it should be done using the manufacturer's tools,
and really any disk that has even one bad sector that the OS
can see should not be relied upon, it should be considered a
failed disk. Disks automatically keep spare sectors that the
operating system cannot see and re-maps bad sectors to them,
if your seeing bad sectors that means that collection of
spares has been exhausted. I've never seen a disk manufacturer
not accept a disk that had bad sectors on it (that was still
under warranty) in as long as I can remember..

nate