File: //proc/self/root/proc/thread-self/root/proc/thread-self/root/proc/fs/ext4/sda2/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 : 28510 1 4258 [ 0 1 1 1 1 0 1 0 1 1 1 1 0 3 ]
#1 : 14279 7 384 [ 5 3 3 4 3 3 2 5 4 2 3 2 1 0 ]
#2 : 4637 10 3438 [ 9 6 8 5 6 5 7 8 5 1 1 0 0 0 ]
#3 : 6650 39 129 [ 26 24 22 23 22 2 2 5 4 2 1 1 0 0 ]
#4 : 9729 3 11464 [ 1 2 1 1 1 3 2 2 2 3 1 1 1 0 ]
#5 : 23254 2 129 [ 2 2 2 1 2 1 2 0 2 2 1 2 2 1 ]
#6 : 32768 1 0 [ 0 0 0 0 0 0 0 0 0 0 0 0 0 4 ]
#7 : 32639 1 129 [ 1 1 1 1 1 1 1 0 1 1 1 1 1 3 ]