Glossary
DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
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Fibre Channel
(FC)
FC is a bidirectional, point-to-point serial data channel, structured for
high-performance capability. In the physical sense, an FC is an
interconnection of multiple communication points, called N_Ports, by
a switching network (fabric). FC transports incoming data from
devices by reading the buffer information, packaging it, and sending the
information across the fabric. Although FC is a generalized transport
mechanism that has no protocol of its own or native I/O command set,
it can transport any existing upper-level protocol such as SCSI and IP.
FC offers high-speed data transfer rates. FC is most commonly used to
connect clustered servers to storage systems. ANSI has developed
standards for FC.
gigabit inter-
face con-
verter
(GBIC)
A GBIC, also referred to as a Physical Link Module, is a physical
component that manages functions of the FC-0 layer. This layer
consists of the physical characteristics of the media and interface,
including drivers, transceivers, connectors, and cables. A GBIC
attaches to an FC adapter and connects a router to an FC host.
High Voltage
Differential
(HVD)
HVD is a differential SCSI scheme with terminators that run on 5 volts.
Host Bus
Adapter
(HBA)
An HBA is the critical link between a host server or workstation and a
storage Subsystem, integrating computing platforms, operating
systems, and I/O protocols to ensure proper inter operability and
functionality. The bus adapter provides direct storage connectivity
from the system to data within the storage Subsystem and enables
stable, high-speed transmission of information and files. HBAs manage
the controller-specific aspects of handling a storage driver interface
device implemented as a target driver, which supports mass storage
peripheral devices such as disks and tapes. A storage driver interface
is used to implement SCSI and other storage device drivers. An HBA
connects to the storage Subsystem to the host computer and uses either
fiber or copper media.
Hot plugging A device with the capability of being connected to a Subsystem without
interrupting the power supplies to that Subsystem.
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