User`s guide

Note:
■ The installation user ID and the installation group must have
read, write and execute permissions to the subdirectory
app .
■ During Oracle Database software installation, you are prompted
for a valid Oracle base directory. You can accept the default value
or enter a new path. The installation procedure creates the Oracle
base directory if possible.
Oracle Database Preinstallation Requirements
3-12 Oracle Database Installation and Administration Guide
You can use the same Oracle base directory for the installation of the Oracle
Management Agent. Multiple Oracle installations require separate installation user IDs
in BS2000/OSD with the consequence of creating separate Oracle base directories in
the POSIX file system. The following are examples of Oracle base directories that can
exist on the same system:
/u01/app/orac1120
/u01/app/ora10205
See "Create or Expand a File System for the Oracle Base Directory" for more
information about the POSIX file system.
3.3.5.2 Oracle Inventory Directory
The Oracle Inventory directory ( oraInventory ) stores the inventory of all software
installed on the system. It is required and shared by all Oracle software installations on
a single system. If you have an existing Oracle Inventory path, then the Oracle
installation procedure uses that Oracle Inventory.
The Oracle installation procedure derives the path for the Oracle Inventory directory
fr
om the file
/var/opt/oracle/oraInst.loc . If this file does not exist, then it derives
the inventory path from
ORACLE_BASE and creates the Oracle Inventory directory in the
following path:
ORACLE_BASE/../oraInventory . For example, if ORACLE_BASE is set to
/u01/app/orac1120 , then the Oracle Inventory directory is created in the path
/u01/app/oraInventory .
The Oracle installation procedure creates the Orac
le subdirectories that you specify
and sets the correct owner, group, and permissions for it. The operating system part of
the path, for example,
/u01/app must exist and you must have read, write and execute
permissions in the directory
app .
Note:
■ All Oracle software installations rely on the Oracle Inventory
directory. Ensure that you back it up regularly.
■ Do not delete this directory unless you have completely removed
all Oracle software from the system.
■ By default, the Oracle Inventory directory is not installed under
the Oracle base directory. This is because all Oracle software
installations share a common Oracle Inventory, so there is only
one Oracle Inventory for all software owners. Whereas, there is a
separate Oracle base directory for each user.