File: //proc/fs/ext4/sda1/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 : 28511 1 4257 [ 1 1 1 1 1 0 1 0 1 1 1 1 0 3 ]
#1 : 7708 17 180 [ 12 8 12 10 8 6 7 5 8 0 0 2 0 0 ]
#2 : 17079 18 6871 [ 9 9 9 15 2 1 1 1 3 1 1 3 2 0 ]
#3 : 20031 12 1842 [ 5 7 7 8 1 2 2 2 2 1 2 4 2 0 ]
#4 : 1399 1 8841 [ 1 1 1 0 1 1 1 0 1 0 1 0 0 0 ]
#5 : 17423 2 1542 [ 1 1 1 1 2 1 1 1 1 1 0 2 1 1 ]
#6 : 12566 4 5614 [ 0 3 0 0 3 1 1 1 0 2 1 1 0 1 ]
#7 : 32639 1 129 [ 1 1 1 1 1 1 1 0 1 1 1 1 1 3 ]