From: mcclnx mcc <mcc...@yahoo.com.tw>
> 2. how O.S. can predicate disk going to failure?
As I understand it, disks can handle a certain amount of bad 'sectors', thanks
to some hidden extra space.
When a 'sector' fails, the disk marks it as 'bad' and then map it to a 'sector'
from the hidden space.
As this extra space is not infinite, after a few months/years, there won't be
any spare 'sector' left.
So, the disk says to the OS: "I will soon fail!"; as in "I am running out of
spare 'sectors' so I won't be able to cope with bad 'sectors'".
Not sure if it is the case for all vendors...
JD
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