File: //proc/fs/ext4/sdb16/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 : 28964 1 3804 [ 0 0 1 0 0 1 0 0 1 0 0 0 1 3 ]
#1 : 15263 22 116 [ 9 9 11 13 11 4 3 8 9 2 2 0 2 0 ]
#2 : 16020 5 4096 [ 2 3 1 3 1 1 1 4 4 2 3 3 1 0 ]
#3 : 32652 1 116 [ 0 0 1 1 0 0 0 1 1 1 1 1 1 3 ]
#4 : 32768 1 0 [ 0 0 0 0 0 0 0 0 0 0 0 0 0 4 ]
#5 : 32652 1 116 [ 0 0 1 1 0 0 0 1 1 1 1 1 1 3 ]
#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 ]