I am processing PSI. I did " mt_prep_snap 20200107 /media/sf_INSAR_20200107_data/ 0.4 3 2 50 200" and i got 6 patches. All 6 patches are full. each patche is 34 items and the size is little bit different for patch 6 , hij 564.9 MB , patche 5 is 575,7 MB and so on .