ASM disk group layout

An ASM disk group is a collection of disks that Oracle ASM manages. Because IBM® Storage Protect Snapshot processes database files at the ASM disk group level, the database files are required to be on dedicated disk groups. Non-application data that is stored on these disk groups is also processed by IBM Storage Protect Snapshot and is included in the backup images. This non-application data is overwritten during a restore operation.

For ASM cloning, the control files must be stored in an ASM disk group. If any control file is not on an ASM disk group, the cloning operation fails with an error.

Extra files that are not associated with the database backup operation but are stored within the same file system, can cause the backup to fail. Use the NEGATIVE_LIST parameter in the IBM Storage Protect Snapshot profile to control the processing of these files. For information about this parameter, see the profile section CLIENT for details.

IBM Storage Protect Snapshot processes table spaces only. The disk group layouts that are required when you are backing up or cloning in an ASM environment are detailed in the Volume group layout requirements section of the Pre-installation Checklist.