File: //proc/fs/ext4/nvme0n1p16/mb_groups
#group: free frags first [ 2^0 2^1 2^2 2^3 2^4 2^5 2^6 2^7 2^8 2^9 2^10 2^11 2^12 2^13 ]
#0 : 28963 1 3805 [ 1 1 0 0 0 1 0 0 1 0 0 0 1 3 ]
#1 : 22550 21 116 [ 12 11 11 11 11 6 2 5 7 2 2 0 0 2 ]
#2 : 17550 2 4096 [ 0 1 1 1 0 0 0 1 0 0 1 0 2 1 ]
#3 : 32652 1 116 [ 0 0 1 1 0 0 0 1 1 1 1 1 1 3 ]
#4 : 16191 4 2538 [ 1 3 2 2 4 1 1 1 2 2 2 0 1 1 ]
#5 : 22911 2 116 [ 1 1 1 1 1 1 1 2 2 1 1 0 1 2 ]
#6 : 32768 1 0 [ 0 0 0 0 0 0 0 0 0 0 0 0 0 4 ]
#7 : 4236 1 116 [ 0 0 1 1 0 0 0 1 2 1 1 1 0 0 ]