LUN

Production End and DR End

Check the storage environments of the production end and the DR end.

Check the remote replication between the production end and the DR end. Before using remote replication to protect objects at the production end, ensure that the remote replication is normal between the production end and the DR end.

DR End

1. Delete the LUNs mapped to the DR host or test host at the DR end and ensure that the corresponding drive letters are not occupied by other LUNs.
2. Check the storage configurations of the DR end.
   • If the storage is T series V2R2 or later or 18000 series, the storage support automatically add host and storage mapping function. If the connection between the storage device and the host initiator is normal, the hosts, host groups, LUN mappings, and mapping view will be created in the storage device automatically.
   • If the DR storage is T series V2 or later series, the DR host can belong to only one host group that belongs to only one mapping view. The remote replication secondary LUN that corresponds to the storage LUN used by the protected applications can belong to only one LUN group, and the LUN group must belong to the same mapping view as the host group.