StoreOnce and Veeam Immutability Compatibility

A backup job that targets an HPE StoreOnce Catalyst repository fails with the following error:

OSCLT_ERR_IMMUTABLE_EPOCH_REQUEST_EXCEEDS_MAXIMUM. Err: -1817

This error occurs when the immutability period required by the job exceeds the value set for 'Maximum ISV Controlled Data Immutability Retention' on the target Catalyst Store.

Starting from HPE StoreOnce firmware version 4.3.2, backups stored on a Catalyst Store can be marked as immutable to prevent accidental or malicious deletion. This feature is supported by Veeam Backup & Replication 12. However, to use this feature, the 'Maximum ISV Controlled Data Immutability Retention' setting on the target Catalyst Store must be configured to a value that is greater than the immutability period needed by the job. If this value is not set high enough, Veeam will attempt to set the immutability period for a file to a value greater than what is allowed by the Catalyst Store setting, which will result in the error described in this KB article.