HP 418800-B21 Redundancy in enterprise storage networks using dual domain SAS - Page 9

Appendix A: Nomenclature and definitions New technologies generate new descriptions and nomenclature surrounding those technologies. This section provides definitions for related concepts, technologies, and infrastructure terms related to storage network redundancy and dual-domain SAS configurations. Dual-path Dual, redundant paths between initiator and target ports can be in the same or different SCSI domains. Dual-port Target devices, such as SAS hard drives, usually incorporate two Phys, or ports. The drives are referred to as "dual-port" because each Phy reports a unique SAS address. JBOD The acronym stands for "Just a Bunch of Disks", JBOD typically refers to a group of hard disks, usually in an enclosure, that are not RAID configured. Multiple SCSI domains If two ports cannot communicate, then they are in different SCSI domains Port Identifier This is a value by which a SCSI port is referenced within a domain. The SCSI port identifier is either an initiator port identifier or a target port identifier. 9