Glossary–5
Hitachi Unified Storage Hardware Service Guide
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F
Fabric
Hardware that connects workstations and servers to storage devices in
a Storage-Area Network (SAN)N. The SAN fabric enables any-server-to-
any-storage device connectivity through the use of Fibre Channel
switching technology.
Failover
The automatic substitution of a functionally equivalent system
component for a failed one. The term failover is most often applied to
intelligent controllers connected to the same storage devices and host
computers. If one of the controllers fails, failover occurs, and the
survivor takes over its I/O load.
Fallback
Refers to the process of restarting business operations at a local site
using the P-VOL. It takes place after the storage systems have been
recovered.
Fault tolerance
A system with the ability to continue operating, possibly at a reduced
level, rather than failing completely, when some part of the system
fails.
FC
See Fibre Channel.
FC-AL
See Arbitrated Loop.
FCOE
See Fibre Channel over Ethernet.
Fibre Channel
A gigabit-speed network technology primarily used for storage
networking.
Fibre Channel over Ethernet
A way to send Fiber Channel commands over an Ethernet network by
encapsulating Fiber Channel calls in TCP packets.
Firmware
Software embedded into a storage device. It may also be referred to as
Microcode.