This part of ISO/IEC 14776 defines a reference model that specifies common behaviors for SCSI devices and an abstract structure that is generic to all SCSI I/O system implementations.This standard specifies generic requirements that pertain to SCSI implementation standards and implementation requirements.This standard defines generic requirements that pertain to SCSI implementation standards. This standard defines implementation requirements. An implementation requirement specifies behavior in terms of measurable or observable parameters that apply to an implementation. Examples of implementation requirements defined in this standard are the status values t