DataDirect Networks EF2800, Руководство пользователя

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
G l o s s a r y
Failback In Active-Active mode, failback is the act of returning ownership of
controller resources from a surviving controller to a previously failed
(but now active) controller. The resources include disk arrays, cache
data, and host ID information.
Failover In Active-Active mode, failover is the act of temporarily transferring
ownership of controller resources from a failed controller to a
surviving controller. The resources include disk arrays, cache data, and
host ID information.
FC adapter
An FC adapter is a printed circuit assembly that translates data
between the FC host processor’s internal bus and FC link.
FC Arbitrated
Loop (FC-
AL)
FC-AL is one of three FC topologies in which ports use arbitration to
establish a point-to-point circuit. Arbitrated loops allow multiple ports
to be connected serially in a single loop. Up to 126 NL_Ports and 1
FL_Port can be configured in a unidirectional loop. Ports arbitrate for
access to the loop based on their AL_PA. Ports with lower AL_PAs have
higher priority than ports with higher AL_PAs. FC-AL can be public,
typically connected using switched fabric, or private, typically a direct
host connection or hub.
FC device A device that uses FC communications is referred to as an FC device.
FC port An FC port is the opening at the back of a router that provides a fiber
optic connection between the FC adapter and FC host.
FC protocol
for SCSI
(FCP)
FCP defines an FC mapping layer (FC-4) that uses FC-PH services to
transmit SCSI command, data, and status information between a SCSI
initiator and SCSI target. FCP enables transmission and receipt of SCSI
commands, data, and status across the FC using standard FC frame and
sequence formats.
Fibre Fibre is a generic FC term that refers to all transmission media types
specified in the FC Physical Layer standard (FC-PH), such as optical
fiber, copper twisted pair, and copper coaxial cable.