disk inconsistency - should 'fsck' always executed with -y ?

[glenn at aoi.ultranet.com (Glenn Burkhardt)]

> I think it might be gangerous to use the -y parameter during boot. You 
> might find that under some circumstances it could really screw up a file 
> system.

Ok, but which circumstances, and when they occur, what do I do?
(or where can I read about it?).

Thanks.

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