1. Duplicate entry 'X-Y-Z' for key index_titles (where index_titles is an index in table_search)

2. After this there where lots of errors: Incorrect key file for table './database/table_search.MYI'; try to repair it

3. After this there where lots of errors: Table './database/table_search' is marked as crashed and should be repaired

myisamchk table_search.MYI

myisamchk: error: Keypointers and record positions doesn't match
MyISAM-table 'table_search.MYI' is corrupted

myisamchk -r -o table_search.MYI

ft_min_word_len=3

shell> myisamchk --recover --ft_min_word_len=3 table_search.MYI