HP 418800-B21 Redundancy in enterprise storage networks using dual domain SAS - Page 1

Redundancy in enterprise storage networks using dual-domain SAS configurations technology brief Abstract...2 Introduction...2 Why dual-domain SAS is important ...2 Single SAS domain ...3 Dual-domain SAS...4 Examples of redundant architectures using serial storage 5 Dual-domain SAS...5 Dual-domain SAS: servers in two-node cluster 6 HP dual-path with cascaded JBODs ...7 Summary ...8 Appendix A: Nomenclature and definitions 9 Dual-path ...9 Dual-port ...9 JBOD ...9 Multiple SCSI domains ...9 Port Identifier ...9 phy...10 SAS domain ...10 SCSI domain...10 SCSI initiator...10 SCSI initiator port ...10 SCSI target port ...10 Appendix B: Enabling technology...11 SAS and SATA technology ...11 Connectors ...12 Backplane ...13 Devices...13 Drives and controllers ...13 Expander ...13 Cluster Interconnect ...13 Firmware and Software ...14 Serial Tunneling Protocol (STP) ...14 SPC-3 Target port group commands 14 For more information...15 Call to action ...15