tests RENAME 1. create files with names : file_1a, file_24, dir_1a, dir_5u two same hashvalue linked lists ($40 and $f8) from the dir block : $F8 $40 887 file_1a 891 dir_1a 889 file_24 893 dir_5u 887 points to 889, 891 points to 893. 2. rename dir_5u into file_5u $F8 $40 887 file_1a 891 dir_1a 889 file_24 893 file_5u 3. rename file_1a into dir_3 $F8 $40 889 file_24 887 dir_3 893 file_5u 891 dir_1a 4. create dir_5a, rename dir_1a into toto $40 887 dir_3 891 dir_1a 895 dir_5u $40 $F8 $20 887 dir_3 889 file_24 891 toto 895 dir_5u 893 file_5u