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SCSI Interface Overview
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2.4
Fibre Channel Interface Overview
The drive’s Fibre Channel Protocol, (FCP), interface consists of two independent
NL_Ports, each of which is a bi-directional 1.0625, 2.125, or 4.250 GHz serial
connection. The ports perform automatic speed negotiation to operate at the higher
speed common to all connected ports. By connecting devices to a hub, a loop of up
to 126 devices can be constructed. Up to 16 million devices can be connected via a
switch. Each port has an LC style optical connector and can be connected to a
separate host, arbitrated loop, or fabric.
The LTO-3 Fibre Channel drives have an internal FC controller integrated into the
drive electronics.
2.4.1
FCP General features
The LTO Fibre Channel drive supports the following:
Connection in point-to-point, arbitrated loop, and fabric topologies as an Nx_Port
Command queuing
Both single and multi-initiator systems
A 1/2/4 Gbit/second autonegotiating port
SCSI-3 task management requests
Reset via selective and broadcast Reset LIP, in addition to the Target and Logical
Unit Reset requests
Auto Contingent Allegiance. For details, see the SCSI Architectural Model–2 (SAM-
2) standard.
2.4.2
Link Services
The following basic link services, extended link services, and -4 link services are
supported 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 legacy
compatibility
Fabric 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)
Summary of Contents for LTO 4
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