I made a small mistake, in 2) replace the word "ONE" with "AT LEAST ONE"
B) "sharing-defrag" a file is share-defragmented if ALL of the following are met:1) all extents are written on disk in neighbouring sectors in the ascending order 2) all pairs of *adjanced* extents meet AT LEAST ONE of the following criteria
2.1) both extents are sufficiently large
2.2) the two extents have mismatching sharing groups (they are
shared by different sets of files)
