Cloud Read and Write Performance
To obtain the best read, write performance on copies, use the same data block size as source copy, if the cloud library is used for a secondary copy.
Block sizes can be modified from the Data Path Properties dialog box available from the Data Paths tab of the Copy Properties dialog box, for the specific data path.
DDB Backup on Cloud
Make sure that the cloud storage library does not have an Archive Object Storage class selected. DDB backups are not recommended on Archive Object Storage, like S3 Glacier/Deep Archive, Azure Archive and Oracle Archive.