File: //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 : 11412 24 562 [ 10 11 11 11 11 12 11 6 8 2 0 1 1 0 ]
#1 : 4493 17 561 [ 9 12 9 11 7 6 3 6 8 0 1 0 0 0 ]
#2 : 18260 39 505 [ 30 23 18 12 10 4 3 3 3 6 3 3 1 0 ]
#3 : 27742 17 552 [ 2 4 5 6 7 5 2 7 7 4 4 3 1 1 ]
#4 : 9174 14 490 [ 0 3 2 1 4 6 1 3 1 2 3 0 1 0 ]
#5 : 22872 17 552 [ 2 3 4 4 8 11 1 10 4 3 4 3 2 0 ]
#6 : 5319 25 492 [ 5 3 11 8 15 11 4 6 6 0 0 1 0 0 ]
#7 : 19928 1 552 [ 0 0 0 1 1 0 1 1 1 0 1 1 2 1 ]