The osc-config-backup tool is not a replacement for an enterprise backup solution. The osc-config-backup tool does not back up your data.
Data storage on the Exadata Storage Servers is not covered by osc-config-backup. Use the Engineered Systems Backup Utility (ESBU) to back up this data. Refer to the article titled RMAN Backup From SPARC SuperCluster to Sun ZFS Backup Appliance (Doc ID 1517107.1), available on MOS at https://support.oracle.com.
For further details and best practices, refer to the white paper titled Oracle Optimized Solution for Backup and Recovery of Oracle SuperCluster, available at: http://www.oracle.com/technetwork/server-storage/hardware-solutions.
After an upgrade or re-installation of the osc-config-backup package, the pkg verify command might report an error about the GID. This occurs when the new installation of osc-config-backup was not able to use the original GID for the osccfbck user and group, it that GID is already in use by other group. This is an example of the error:
# pkg verify osc-config-backup
PACKAGE
STATUS
pkg://exa-family/system/platform/supercluster/osc-config-backup
ERROR
user: osccfbck
ERROR: group: 'oninsall' should be 'osccfbck'
The error can be ignored because it does not prevent osc-config-backup from functioning properly.