File: //proc/self/root/proc/self/root/proc/fs/ext4/sdc2/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 : 2774 16 8788 [ 8 3 6 4 7 9 6 9 3 0 0 0 0 0 ]
#1 : 21741 24 588 [ 17 8 7 10 14 10 11 11 8 1 6 3 1 0 ]
#2 : 27570 14 519 [ 2 2 5 5 7 2 7 6 2 2 2 1 1 2 ]
#3 : 5131 10 579 [ 3 4 4 4 7 5 3 2 3 1 1 1 0 0 ]
#4 : 1854 19 519 [ 8 13 11 6 10 3 5 3 1 1 0 0 0 0 ]
#5 : 4740 34 579 [ 18 21 18 18 25 1 5 1 2 2 2 0 0 0 ]
#6 : 2468 18 514 [ 0 6 6 6 9 2 4 1 1 1 1 0 0 0 ]
#7 : 10583 13 579 [ 1 3 4 4 6 2 2 4 4 3 1 1 1 0 ]