find
tem %S
do especificador de formato que é chamado de "dispersão"
%S File's sparseness. This is calculated as (BLOCKSIZE*st_blocks / st_size). The exact value you will get for an ordinary file of a certain length is system-dependent. However, normally sparse files will have values less than 1.0, and files which use indirect blocks may have a value which is greater than 1.0. The value used for BLOCKSIZE is system-dependent, but is usually 512 bytes. If the file size is zero, the value printed is undefined. On systems which lack support for st_blocks, a file's sparseness is assumed to be 1.0.
$ fallocate -l 1000000 data
$ find data -printf '%S\n'
1.00352
$ fallocate -p -o 250000 -l 500000 data
$ find data -printf '%S\n'
0.507904