Technical data

Glossary-13
RR_TOV Resource recovery timeout value. The minimum time a target device in a loop waits after an LIP before
logging out an 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. The fabric controller issues RSCN requests to N_Ports and
NL_Ports, but only if they have registered to be notified of state changes in other N_Ports and
NL_Ports. This registration is performed via the State Change Registration (SCR) Extended Link
Service. An N_Port or NL_Port can issue an RSCN to the fabric controller without having completed
SCR with the fabric controller.
RTWR Reliable transport with response. Might appear as a task in portlogdump command output.
RW Read/write. Refers to access rights.
RX Receiving frames.
S
SAN Storage area network. A network of systems and storage devices that communicate using Fibre Channel
protocols. See also fabric.
SCC SC connector. An SC connector is a fiber-optic cable connector that uses a push-pull latching
mechanism similar to common audio and video cables. For bidirectional transmissions, two fiber cables
and two SC connectors (dual SC) are generally used. SC is specified by the TIA as FOCIS-3.
SCN State change notification. Used for internal state change notifications, not external changes. This is the
switch logging that the port is online or is an Fx_Port, not what is sent from the switch to the Nx_Ports.
SCR State change registration. Extended Link Service (ELS) requests the fabric controller to add the N_Port
or NL_Port to the list of N_Ports and NL_Ports registered to receive the Registered State Change
Notification (RSCN) Extended Link Service.
SCSI Small Computer Systems Interface. A parallel bus architecture and a protocol for transmitting large data
blocks to a distance of 15 to 25 meters.
SCSI-2 An updated version of the SCSI bus architecture.
SCSI-3 An SCSI standard that defines transmission of SCSI protocol data over different kinds of links.
SDRAM The main memory for a switch.
sectelnet A protocol similar to telnet but with encrypted passwords for increased security.
Secure Fabric
OS
An optionally licensed Brocade feature that provides advanced, centralized security for a fabric.
security policy Rules that determine how security is implemented in a fabric. Security policies can be customized
through Brocade Secure Fabric OS or Brocade Fabric Manager.
server A computer that processes end-user applications or requests.