SCSI Interface Overview Page 122.4 Fibre Channel Interface OverviewThe drive’s Fibre Channel Protocol, (FCP), interface consists of two independentNL_Ports, each of which is a bi-directional 1.0625, 2.125, or 4.250 GHz serialconnection. The ports perform automatic speed negotiation to operate at the higherspeed common to all connected ports. By connecting devices to a hub, a loop of upto 126 devices can be constructed. Up to 16 million devices can be connected via aswitch. Each port has an LC style optical connector and can be connected to aseparate host, arbitrated loop, or fabric.The LTO-3 Fibre Channel drives have an internal FC controller integrated into thedrive electronics.2.4.1 FCP General featuresThe LTO Fibre Channel drive supports the following:Connection in point-to-point, arbitrated loop, and fabric topologies as an Nx_PortCommand queuingBoth single and multi-initiator systemsA 1/2/4 Gbit/second autonegotiating portSCSI-3 task management requestsReset via selective and broadcast Reset LIP, in addition to the Target and LogicalUnit Reset requestsAuto Contingent Allegiance. For details, see the SCSI Architectural Model–2 (SAM-2) standard.2.4.2 Link ServicesThe following basic link services, extended link services, and -4 link services aresupported by The LTO Fibre Channel drive:Abort Sequence (ABTS)Accept (ACC)Basic Accept (BA_ACC)Basic Reject (BA_RJT)Discover Address (ADISC)Discover N_Port Parameters (PDISC) – Obsolete, but supported for legacycompatibilityFabric Login (FLOGI)Fabric Address Notification (FAN)Logout (LOGO)Link Service Reject (LS_RJT)N_Port Login (PLOGI)Process Login (PRLI)Process Logout (PRLO)Read Exchange Concise (REC)
