File: //proc/self/root/proc/self/root/proc/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 : 28511 1 4257 [ 1 1 1 1 1 0 1 0 1 1 1 1 0 3 ]
#1 : 5620 19 180 [ 12 10 13 8 6 6 7 5 8 0 0 1 0 0 ]
#2 : 12742 23 6871 [ 14 16 8 7 2 1 2 3 3 0 1 1 2 0 ]
#3 : 17110 23 778 [ 12 11 13 6 1 2 2 1 1 0 0 0 2 1 ]
#4 : 952 1 9288 [ 0 0 0 1 1 1 0 1 1 1 0 0 0 0 ]
#5 : 6188 4 1543 [ 2 1 0 1 4 1 1 1 1 3 0 0 1 0 ]
#6 : 21746 3 4096 [ 0 1 0 0 1 1 1 1 0 0 1 0 3 1 ]
#7 : 32639 1 129 [ 1 1 1 1 1 1 1 0 1 1 1 1 1 3 ]