Hello, lisali!
Yes. You can add OceanStor 9000 nodes online to expand the capacity. Services will not be interrupted.
The V100R001 and V300R005 versions are generally T3000 server and using V3 server expansion.
The V300R006 versions are generally V3 server and using V5 server expansion. The software version must be upgraded to 7.0.1.
The V5 versions are V5 server and using V5 server expansion.
Thanks!