About backward compatibility support
To replicate an image from an earlier version (NetBackup 8.2 or earlier) of an MSDP server to the cloud LSU of target MSDP server, you need a username with the cloud LSU name when you add the A.I.R. target. Use the web UI to add an A.I.R. target. The format of the username with the target cloud LSU is:
<username>?LSU=<target cloud LSU>
For example, there is a target storage server and the username of the server is userA and there is a cloud LSU s3cloud1 in the target storage server. To replicate an image from an old storage server to the cloud LSU of the target server, you can use the following username while adding the A.I.R. target:
userA?LSU=s3cloud1
You must also create an import SLP for the local volume of the target storage server in the target primary server. Then select the imported SLP when you create the target A.I.R. SLP on the source side. When the A.I.R. runs, the import job on the target side shows the policy name as SLP_No_Target_SLP in the Activity monitor, but the data is sent to cloud.
If the NetBackup client version is 8.2 or earlier, the client direct backup from the old client to cloud LSU of one storage server might fail. During the backup if mtstrmd is used on the client side, the job fails with a media write error. To disable mtstrmd at the client side, open the configuration file pd.conf on the client and change the following:
MTSTRM_BACKUP_ENABLED = 1 to MTSTRM_BACKUP_ENABLED = 0.
The pd.conf file is located in the following directories:
UNIX
/usr/openv/lib/ost-plugins/Windows
install_path\Veritas\NetBackup\bin\ost-plugins
When a client direct backup runs with a cloud LSU and an old client, the client does only client-side deduplication.
To use cloud LSU, the load balance server of the storage server must not be an earlier version (NetBackup 8.2 or earlier). If there are new and old load balancers, a new load balance server is selected automatically to make sure that the job can be done successfully. When you restore a backup image on cloud LSU and you select the media server explicitly, the media server that you select must not be an earlier version of NetBackup.