Disk block or sector to file mapping?

[Matthew Hagerty]

Greetings,

I have a drive that failed and fsck and dump both report the failed 
sector or block (the term seems to be used interchangeably at times), 
but how can I find out what file(s) were using that block?  I have a 
file-based backup and I could possibly replace the bad files if I know 
which ones were affected by the bad blocks.

Thanks,
Matthew