Defining storage groups to direct data to specific optical media types

With the IBM 3995 multifunction optical disk drives, a customer can choose to populate a single library with both WORM and rewritable optical media. This configuration allows the customer to direct data for a particular application to the WORM media while directing data for another application to the rewritable media on the same optical device.

To achieve this control over which media type is used for a specific application’s data (objects) residing in the same optical library dataserver as another application’s data, it is recommended that the following steps be completed:

Define one or more Object storage groups for the application that wishes to have its objects stored on WORM media and one or more Object storage groups for the application that wishes to have its objects stored on rewritable media. Also include the library name associated with the library model in the Object storage group definition for each application.
Enter the media into the 3995 optical library dataserver. The optical disk volumes residing on the WORM or rewritable media should be associated with one of the Object storage groups set up for the application that requires its data to be stored on the specific media type.
Update the SMS storage group ACS routine to insure that the data belonging to the individual applications is assigned to the appropriate Object storage groups that only have WORM or rewritable optical disk volumes associated with them.
Make certain there are sufficient optical disk volumes with available space and of the appropriate media type assigned to each Object storage group at all times.
Make certain there are NO OAM scratch optical disk volumes in the multifunction 3995 Optical Library Dataserver. An OAM scratch optical disk volume can be assigned by OAM to any Object storage group when the Object storage group encounters an ‘out-of-space’ condition. All optical disk volumes should be preassigned to a given Object storage group based on the media type of the optical disk volume.

Another way for you to direct data belonging to different applications to different types of media is:

Having two or more multifunction 3995 Optical Library Dataservers and populate one with WORM media and the other with rewritable media.
Defining one or more Object storage groups for the application or applications for which you want data stored on either WORM or rewritable media, and including the library name associated with the multifunction library in the Object storage group definition.
Using the Default Media Type option to restrict the media type that can be entered into a specific optical library dataserver. See the description of the DEFAULT MEDIA TYPE parameter in Defining real 3995 libraries for more information on the Default Media Type option.