IBM F16 User Manual page 111

Remote Switch. A feature that runs on Fabric
operating system (OS) and enables two fabric switches
to be connected over an asynchronous transfer mode
(ATM) connection. This requires a compatible Fibre
Channel to ATM gateway, and can have a distance of
up to 10 km (6.214 mi) between each switch and the
respective ATM gateway.
request rate. The rate at which requests arrive at a
servicing entity. See also service rate.
resource allocation timeout value (R_A_TOV). Used
to time out operations that depend on the maximum
possible time that a frame can be delayed in a fabric
and still be delivered. This value is adjustable in one
microsecond increments from 10 - 120 seconds.
resource recovery timeout value (RR_TOV). The
minimum time a target device in a loop waits after a
loop initialization primitive (LIP) before logging out a
small computer systems interface (SCSI) initiator. See
also error detect timeout value and resource allocation
timeout value.
RISC. See reduced instruction set computer.
ro. Read only.
ROM. See read only memory.
route. As applies to a fabric, the communication path
between two switches. Can also apply to the specific
path taken by an individual frame, from source to
destination. See also Fibre Channel shortest path first.
routing. The assignment of frames to specific switch
ports, according to frame destination.
RPC. See remote procedure call.
RR_TOV. See resource recovery timeout value.
RSCN. See registered state change notification.
RSH. Remote shell.
rw. Read-write.
SAN. See storage area network.
SC. Standard connector.
SCSI. See small computer systems interface.
SCSI Enclosure Services (SES). A subset of the
small computer systems interface (SCSI) protocol used
to monitor temperature, power, and fan status for
enclosure devices.
SDR. Single data rate.
SDRAM. See synchronous dynamic random access
memory.
Secure Fabric OS. An optionally-licensed software
product that runs on top of the Fabric OS and provides
customizable security restrictions through local and
remote management channels on a switch.
SERDES. Serializer/deserializer.
service rate. The rate at which an entity can service
requests. See also request rate.
SES. See SCSI Enclosure Services.
SESD. An SES device.
SFP. See small form-factor pluggable.
short wavelength (SWL). A type of fiber optic cabling
that is based on 850 mm lasers and supports 1.0625
Gbps link speeds. Can also refer to the type of gigabit
interface converter (GBIC) or small form-factor
pluggable (SFP). See also long wavelength.
SID. 3-byte source ID of the originator device, in the
0xDomainAreaALPA format.
SID-DID. Source identifier-destination identifier.
SIMMS. Single in-line modules.
simple name server (SNS). 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. SNS is defined by Fibre Channel
standards and exists at a well-known address. Can also
be referred to as directory service. See also Fibre
Channel service.
simple network management protocol (SNMP). In
the Internet suite of protocols, a network management
protocol that is used to monitor routers and attached
networks. SMNP is an application layer protocol.
Information on devices managed is defined and stored
in the application's Management Information Base
(MIB).
single mode. The fiber optic cabling standard that
corresponds to distances of up to 10 km (6.214 mi)
between devices.
small computer systems interface (SCSI). A parallel
bus architecture and a protocol for transmitting large
data blocks up to a distance of 15 - 25 m (49 - 82 ft).
small form-factor pluggable (SFP). An optical
transceiver used to convert signals between optical fiber
cables and switches.
SMI. Special memory interface.
SNIA. Storage Network Industry Association.
SNMP. See simple network management protocol.
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Glossary