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Bad Block table

I have a laptop running Windows XP Pro.   The event viewer shows there are bad blocks on the drive.  I want to understand the bad block table.

My question:  

Tell me more about the bad block table.  For example:
-      under what conditions can data be written to a bad block once it is identified?

-      If a file occupies a bad block, can it be deleted?   Will that mean other data can be written to the spot with the bad block?

1 Solution
Ady FootSharePoint ConsultantCommented:
Hi there,

If you are using NTFS the file system will automatically identify bad blocks and mark them as unuseable.  This means that data can no longer be written to those blocks but it also means that data once occupying those blocks may no longer be readable.

Bad blocks can sometimes mean that a drive failure is imminent - I would strongly advise that you do a complete system backup just in case.


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