Appendix A: Nomenclature And Definitions; Dual-Path; Dual-Port; Jbod - HP 381513-B21 - Smart Array P800 Controller RAID Technology Brief

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.
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