Oracle ORACLE9I B10508-01 Installation Manual page 39

Oracle9i Release 2 Dependency on ODS-5 Disk Structure
In general, ODS-5 format allows VMS to support Microsoft Windows file naming
formats. Longer file names, additional character support, and the ability to have
lowercase and mixed-case file names are some of the features supported on ODS-5
disks.
The disks on which the Oracle code tree resides must be formatted in Files-11
On-Disk Structure Level 5 (ODS-5) format. This is the disk to which the VMS
logicals ora_root, ora_rootdir, and oracle_home will point. The
directory that is referenced by these logicals is the parent directory for all Oracle
RDBMS software, such as APACHE, CTX, INSTALL, NETCONFIG, RDBMS, UTIL,
and so forth. The disks on which Oracle database files reside can be formatted as
either ODS-2 or ODS-5.
Oracle Corporation STRONGLY urges you to read the
Caution:
OpenVMS Guide to Extended File Specifications PRIOR to
changing the structure of any disk. This guide discusses ODS-2
and ODS-5 formats in much more detail and has important
information that you must understand and follow.
Oracle Note 205630.1 can be viewed at Oracle MetaLink. Alternatively, use the
search function and search for "ODS-5" for more information.
Precautions
Do not change the format of any VMS disk without first making a backup of the
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disk.
Conversion from ODS-2 to ODS-5 does not require you to restore files.
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Conversion from ODS-5 to ODS-2 does require you to restore files.
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Contact Hewlett-Packard for more information on reverting back to ODS-2
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format from ODS-5 format.
Changes and Enhancements
Release Information 2-3