File: //proc/thread-self/root/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 : 13201 31 592 [ 11 7 14 6 15 7 3 5 6 2 1 0 2 0 ]
#1 : 17352 9 554 [ 4 6 4 5 6 5 2 2 3 3 4 5 0 0 ]
#2 : 17893 9 494 [ 3 5 4 5 4 1 1 2 4 0 4 2 2 0 ]
#3 : 29295 9 552 [ 1 1 1 1 4 5 4 5 6 4 8 4 2 0 ]
#4 : 6472 5 493 [ 4 2 2 1 3 2 1 1 0 2 1 0 1 0 ]
#5 : 24689 22 552 [ 3 5 5 6 12 5 3 12 8 4 2 2 1 1 ]
#6 : 14144 42 496 [ 20 16 17 15 17 8 3 3 4 1 1 1 0 1 ]
#7 : 8085 11 552 [ 3 1 2 5 4 3 3 2 1 2 2 0 1 0 ]