Impersonating scsi ports through an intermediate proxy

A proxy storage system, comprising:

• one or more proxy ports coupled to a storage area network (SAN);
• and
• a processor configured:
• to ascertain a respective port identifier for each of one or more host ports defined to the proxy storage system for a logical volume stored on an owner storage system,
• to assign a respective unique identifier to each of the ascertained one or more host ports,
• to convey, for each of the one or more host ports, the respective port identifier and the assigned respective unique identifier to the owner storage system, and
• upon receiving, from one of the one or more host ports, an input/output (I/O) request for the logical volume via one of the one or more proxy ports, to convey, to the owner storage system, the I/O request with the respective unique identifier of the one of the one or more host ports.

An owner storage system, comprising:

• multiple owner ports configured to communicate with one or more proxy storage systems via a storage area network (SAN);
• a storage device configured to store a logical volume mapped on the one or more proxy storage systems to a host computer having multiple host ports;
• and
• a processor configured:
• to receive configuration data from each of the one or more proxy storage systems, the configuration data comprising a port identifier and a respective unique identifier for each host port defined for each of the one or more proxy storage systems,
• subsequent to receiving the configuration data, to receive, from one of the one or more proxy storage systems, an input/output (I/O) request for the logical volume, the I/O request including a given unique identifier, and
• to ascertain, using the configuration data, one of the host ports that originated the I/O request.