About MSDP cloud immutable (WORM) storage support
Cloud immutable storage allows you to store the backup data in the cloud, which you write once but you cannot change or delete it. This feature is supported on Red Hat Linux operating system only.
This feature does not support legal hold and bucket default retention.
Netbackup supports the following cloud immutable storages:
Amazon S3 immutable storage
Amazon S3 compatible storages
See About immutable object support for AWS S3 compatible platforms.
Microsoft Azure immutable storage
See About immutable storage support for Azure blob storage .
With NetBackup 10.0.1, you can use cloud immutable storage in a cluster environments. For more information, See About using the cloud immutable storage in a cluster environment.