Provided is a module mounted in a server to share a block-level storage and resources. The module includes: a HBA card unit for connection to an external server; an internal disk unit providing a storage space inside a server; a setting unit allocating the storage space of the internal disk unit; a target driver unit implementing a SCSI protocol, communicating with the external server and setting volumes to a storage mode or a server mode; and a target core unit routing data of the internal disk unit and the target driver unit depending on the storage mode or the server mode. The storage mode allows the volumes to be used as a storage of the external server. The server mode allows the volumes to be used as a storage inside the server. The target driver unit can switch the volumes from the server mode to the storage mode.