On Fri, Dec 14, 2012 at 03:46:18PM +0100, [email protected] 
wrote:

>  smartparameters were indicating something's wrong, then the disk
> was quite likely to fail soon. On the other hand, most disks simply
> failed without any prior warning in the smart parameters.
> 
> My disk too gave no warning.
> 

There is nothing certain. Few months ago I got one of my disk still in
warranty was replaced, because it was going to have bad blocks. It had
no bad block but S.M.A.R.T attributes suggested it had or it would
fail soon. Don't remember which one. It was crashing the system and
was producing noises. These were good indicators for me, but yes it
could be that a disk doesn't indicate that is going to fail.

Just, backup and let it fail! :) And backup the backup as well. ;)

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