psigroup@psi0 : ~ $  cat /proc/diskstats
   1    0 ram0 0 0 0 0 0 0 0 0 0 0 0
   1    1 ram1 0 0 0 0 0 0 0 0 0 0 0
   1    2 ram2 0 0 0 0 0 0 0 0 0 0 0
   1    3 ram3 0 0 0 0 0 0 0 0 0 0 0
   1    4 ram4 0 0 0 0 0 0 0 0 0 0 0
   1    5 ram5 0 0 0 0 0 0 0 0 0 0 0
   1    6 ram6 0 0 0 0 0 0 0 0 0 0 0
   1    7 ram7 0 0 0 0 0 0 0 0 0 0 0
   1    8 ram8 0 0 0 0 0 0 0 0 0 0 0
   1    9 ram9 0 0 0 0 0 0 0 0 0 0 0
   1   10 ram10 0 0 0 0 0 0 0 0 0 0 0
   1   11 ram11 0 0 0 0 0 0 0 0 0 0 0
   1   12 ram12 0 0 0 0 0 0 0 0 0 0 0
   1   13 ram13 0 0 0 0 0 0 0 0 0 0 0
   1   14 ram14 0 0 0 0 0 0 0 0 0 0 0
   1   15 ram15 0 0 0 0 0 0 0 0 0 0 0
   8    0 sda 884577 1258904 273664742 1914824 54776 200265 2152648 3738948 0 1855936 5653764
   8    1 sda1 4514 111966 66251 530008
   8    2 sda2 74 592 2 16
   8    3 sda3 2138797 273551416 188818 1510544
   8   16 sdb 4295 1681 167010 37748 369129 2022680 275659080 28069860 0 6099396 28107600
   8   17 sdb1 4742 120836 66251 530008
   8   18 sdb2 52 416 2 16
   8   19 sdb3 1085 44982 2325587 275016976
   9    0 md0 9013 0 232538 0 61943 0 495544 0 0 0 0
   9    1 md1 88 0 704 0 0 0 0 0 0 0 0
   9    2 md2 2735 0 89574 0 179118 0 1432944 0 0 0 0
  11    0 sr0 25 118 572 1888 0 0 0 0 0 1504 1888
 254    0 dm-0 212 0 1690 824 1091 0 8728 49880 0 12464 50704
 254    1 dm-1 1779 0 81938 7232 75958 0 607664 7604496 0 554160 7611728
 254    2 dm-2 440 0 3514 2436 102069 0 816552 83609392 0 61068 83611828