File: //proc/fs/ext4/sdf/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 : 8779 2 16384 [ 1 1 0 1 0 0 1 0 0 1 0 0 0 1 ]
#1 : 144 16 1270 [ 6 5 6 9 2 0 0 0 0 0 0 0 0 0 ]
#2 : 127 17 7668 [ 11 6 10 6 1 0 0 0 0 0 0 0 0 0 ]
#3 : 92 9 2035 [ 6 5 7 6 0 0 0 0 0 0 0 0 0 0 ]
#4 : 163 25 1275 [ 15 16 9 8 1 0 0 0 0 0 0 0 0 0 ]
#5 : 83 18 505 [ 11 8 4 3 1 0 0 0 0 0 0 0 0 0 ]
#6 : 4 2 16381 [ 2 1 0 0 0 0 0 0 0 0 0 0 0 0 ]
#7 : 4 2 16382 [ 0 2 0 0 0 0 0 0 0 0 0 0 0 0 ]
#8 : 8 1 32760 [ 0 0 0 1 0 0 0 0 0 0 0 0 0 0 ]
#9 : 6 2 16382 [ 0 1 1 0 0 0 0 0 0 0 0 0 0 0 ]
#10 : 21 2 16375 [ 1 0 1 2 0 0 0 0 0 0 0 0 0 0 ]
#11 : 0 0 32768 [ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ]
#12 : 52 9 1208 [ 2 3 3 2 1 0 0 0 0 0 0 0 0 0 ]
#13 : 39 8 22374 [ 7 4 2 2 0 0 0 0 0 0 0 0 0 0 ]
#14 : 29984 3 2214 [ 2 5 1 4 1 1 1 1 0 0 1 0 1 3 ]
#15 : 14117 41 3462 [ 35 29 28 23 14 8 11 8 9 2 2 1 1 0 ]