Managing disaster recovery replication for storage volumes

A controller for a storage area network, said storage area network comprising one or more replicating source and target storage volumes accessible to one or more hosts, said controller comprising:

• volume replication status checker for determining an active replication relationship between a source storage volume and a target storage volume;
• and
• a volume visibility engine for setting the target storage volume to be hidden from a host as a result of determining that the target storage volume is visible to the host and as a result of the volume replication status checker determining that there is an active replication relationship between the source storage volume and the target storage volume, wherein determining that the target storage volume is visible to the host comprises checking a volume mapping table for an indication of whether the target storage volume is visible to the host.

A method for a storage area network, said storage area network comprising a replicating source and target storage volume accessible by one or more hosts, said method comprising:

• determining an active replication relationship between the source storage volume and the target storage volume;
• and
• setting the target storage volume to be hidden from a host as a result of determining that the target storage volume is visible to the host and as a result of the volume replication status checker determining that there is an active replication relationship between the source storage volume and the target storage volume, wherein determining that the target storage volume is visible to the host comprises checking a volume mapping table for an indication of whether the target storage volume is visible to the host.

A method for a storage area network, said storage area network comprising one or more hosts with access to one or more replicating source and target storage volumes, said method comprising:

• determining an inactive replication relationship between a source storage volume and a target storage volume;
• and
• setting the target storage volume to be visible to a host as a result of determining that the target storage volume is hidden from the host and as a result of the volume replication status checker determining that there is an inactive replication relationship between the source storage volume and the target storage volume, wherein determining that the target storage volume is hidden from the host comprises checking a volume mapping table for an indication of whether the target storage volume is hidden from the host.

A computer program product for a storage area network, said storage area network comprising one or more replicating source and target storage volumes accessible by one or more hosts, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• determine an active replication relationship between a source storage volume and a target storage volume;
• and
• set the target storage volume to be hidden from a host as a result of determining that the target storage volume is visible to the host and as a result of the volume replication status checker determining that there is an active replication relationship between the source storage volume and the target storage volume, wherein determining that the target storage volume is visible to the host comprises checking a volume mapping table for an indication of whether the target storage volume is visible to the host.