Instruction Manual

RAID Redundant Array of Independent Disks. A collection of disk
drives that appear as a single volume to the server and are
fault tolera nt through mirroring or parity checking.
request rate Therateatwhichrequestsarriveataservicingentity.
route With respect to a fabric, the communication path between two
switches. May also apply to the specific path taken by an
individua l frame from source to destination.
routing The assignment of frames to specificswitchportsaccordingto
frame destination.
RR_TOV Resource recovery time-out value. The minimum time a target
device in a loo p waits after a LIP before logging out a SCSI
initiator.
RSCN Registered state change notification. A switch function that
allows notificationoffabricchangestobesentfromtheswitch
to the specified nodes.
SAN Storage area network. A network of systems and storage
devices that communicate using FC protocols.
SDRAM Synchronous dynamic random access memory. The main
memory for a switch. See also switch.
sequence A group of related frames transmitted in the same direction
between two N_ports.
service rate The rate at which an entity can service requests.
single mode The fiber o ptic cabling standard that corresponds to distances
up to 10 km between devices.
SNMP Simple Network Management Protocol. An Internet
management protocol that uses either IP for network-level
functions and UDP for transport functions, or TCP/IP for
both. SNMP can be made available over other protocols
(suchasUDP/IP)becauseitdoesnotrelyontheunderlying
communication protocols. See also MIB, trap (SNMP).
SNS Simple Name Server. A switch service that stores names,
addresses, and attributes for up to 15 minutes, and provides
them as required to other devices in the fabric. May also b e
referred to as a directory service.
switch Hardware that routes frames according to FC protocol and is
controlled by software.
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Glossary