File: //proc/thread-self/root/proc/thread-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 : 2471 13 181 [ 7 4 6 6 3 3 5 3 6 0 0 0 0 0 ]
#2 : 6764 13 6871 [ 6 7 2 4 1 1 2 1 3 1 1 2 0 0 ]
#3 : 24510 3 3179 [ 2 2 2 2 2 0 0 1 1 3 0 1 1 2 ]
#4 : 1399 2 8192 [ 1 1 1 2 2 2 0 0 1 0 1 0 0 0 ]
#5 : 25416 6 1542 [ 2 3 2 3 2 2 3 0 2 0 2 1 1 2 ]
#6 : 25105 1 7663 [ 1 0 0 0 1 0 0 0 0 1 0 0 0 3 ]
#7 : 21018 4 897 [ 2 2 1 2 2 1 1 1 1 0 0 0 1 2 ]