for checking whole drive and a lot of files I use md5deep:
md5deep -lrk ./* > data.md5
sort -k 2 data.md5 > data.md5.sort
diff data.md5.sort data.md5.sort.old
for checking whole drive and a lot of files I use md5deep:
md5deep -lrk ./* > data.md5
sort -k 2 data.md5 > data.md5.sort
diff data.md5.sort data.md5.sort.old