If you decide to place the Oracle Database files on a file system, then use the following guidelines when deciding where to place them:

• Guidelines for Placing Oracle Database Files on a File System or Logical Volume
  Review the guidelines for placing Oracle Database files on a file system or logical volume.
• Guidelines for Placing Oracle Recovery Files on a File System
  Use the guidelines listed in this section to place Oracle recovery files on a file system.
• Creating Required Directories
  Use this procedure to create the required directories.