dm-20  어디 파일시스템인지 찾기

- 253:20 같은것으로 찾으면 된다.

# cat /proc/diskstats
 253      20 dm-20 3543374 0 213979043 21716240 145684 0 5267648 64436 0 1989240 21781768
 253      21 dm-21 176258 0 4535954 836972 30237 0 325856 5888 0 559892 842860
 253      22 dm-22 1074885 0 56868642 5570344 62084 0 1036792 14048 0 986352 5584488
 253      23 dm-23 183451 0 13649762 940600 43559 0 1073160 10708 0 272844 951312
 253      24 dm-24 394347 0 26355538 2166824 182000 0 12986872 66836 0 612196 2233688


# lvdisplay

  --- Logical volume ---
  LV Name                /dev/datavg/lv_oraKTQsapdata2
  VG Name                datavg
  LV UUID                cuDr57-qHHS-UThm-rFTu-N9JF-yW6I-VI6XtU
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                253.00 GB
  Current LE             64768
  Segments               6
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     1024
  Block device           253:20