Changing optical environment parameters
The Change Optical Attributes (CHGOPTA) command can be used to change specific optical configuration parameters that affect all jobs using the optical file system.
The following parameters can be set according to your configuration.
- Copy attributes
- This parameter specifies whether to copy the file attributes of the source file when copying or moving files between the QDLS and the QOPT file systems using the HFS Copy or Move Stream File APIs. This parameter is ignored when copying or moving files within the optical file system and is not valid for LAN-attached optical libraries. This value should be set to *NO when applications do not require the file attributes to be maintained when copying between the QOPT and QDLS file systems. Using this option improves the performance of move and copy operations and reduces the optical storage requirements when writing to an optical disk.
- Held file attribute
This parameter specifies whether held optical file
support is enabled or disabled for the QOPT file system. When held
optical file support is disabled, it is up to the user to ensure that
correct recovery procedures are followed when there is a close file
error condition.
- Allow variant characters
- This parameter indicates whether variant characters can be specified for path names when accessing files on optical volumes in Universal Disk Format (UDF) through the hierarchical file system (HFS) interfaces. The parameter does not affect access to optical volumes formatted in High Performance Optical File System (HPOFS) or ISO 9660 formats. It also has no effect on integrated file system interfaces for all optical media formats.
- Support extended media formats
- This parameter indicates which media format to use when media is added to an optical device. Some media have both a primary and an extended media format. For instance, a UDF-Bridge Disk has ISO 9660 as the basic format and UDF as the extended format. Rock Ridge alternate name structures is another format that is supported. With this parameter, you can choose which format is to be used when media is added to a device.