1 file creation
    2 file open
    3 file resize
    4 file deletion
    5 file close
    6 wait for all aio requests to finish
    7 write verification
    8 wait for miscellaneous io (ftp, block dump, passwd file)
    9 read from snapshot files

    1 Control File
    2 Data File
    3 Log File
    4 Archive Log
    6 Temp File
    9 Data File Backup
   10 Data File Incremental Backup
   11 Archive Log Backup
   12 Data File Copy
   13 Parameter File
   14 DR Config file
   15 OSM File
   16 Change Tracking File
   17 Flashback Log
   18 Data Pump Dump File
   19 Cross Platform Data File
   20 Auto Backup File
   21 OS file
   22 Block Dump File
   23 CSS Voting File
   24 OCR File
   25 ASM Staleness File
   26 ASM Vol Device File
   27 ASM Vol Dirty Region File
   28 Password File
   29 ADS AMS Relation File
   30 OCR Backup File
   31 ASM Parameter File
   32 Flash File
   33 ASM spfile backup
   34 External Table File
   35 Data File XTT Backup
   36 OS Audit File
   37 Data File Incremental Backup
   38 AKM KeyStore
   39 AKM AutoLogin KeyStore
   40 ORS Block Pool File
   41 SQL Loader File
   42 AM Container File