HP StorageWorks Multi-protocol Router Installation Guide (A7437-96003, September 2005)

Multi-protocol router installation guide 103
Q
quad A group of four adjacent ports that share a common pool of frame buffers.
R
R_A_TOV Resource allocation time-out value. The maximum time a frame can be delayed in the
fabric and still be delivered.
RAID Redundant Array Of Independent Disks. A collection of disk drives that appear as a
single volume to the server and are fault tolerant through mirroring or parity checking.
request rate The rate at which requests arrive at a servicing entity.
route As applies to a fabric, the communication path between two switches. May also
apply to the specific path taken by an individual frame, from source to destination.
routing The assignment of frames to specific switch ports, according to frame destination.
RR_TOV Resource recovery time-out value. The minimum time a target device in a loop waits
after a LIP before logging out a SCSI initiator.
RSCN Registered state change notification. A switch function that allows notification of fabric
changes to be sent from the switch to specified nodes.
S
SAN Storage Area Network. A network of systems and storage devices that communicate
using fibre channel protocols.
SDRAM The main memory for the 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 optic cabling standard that corresponds to distances of up to 10 km
between devices.