IBM TotalStorage 3534-F08, Installation Manual

Page: 70 / 81

registered state change notification (RSCN). A
switch function that allows notification of fabric changes
to be sent from the switch to specified nodes.
remote procedure call (RPC). A facility that a client
uses to request the execution of a procedure call from a
server.
Remote Switch. A product that runs on Fabric 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 LIP
before logging out a SCSI initiator. See also error detect
timeout value, resource allocation timeout value.
RISC. Reduced Instruction Set Computer.
ro. Read only.
ROM. Read only memory.
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. 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
SCSI protocol used to monitor temperature, power, and
fan status for enclosure devices.
SDR. Single data rate.
sequence. A group of related frames transmitted in the
same direction between two N_ports.
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.
SFF. Bidirectional devices (transceivers) that can
receive serial optical signals and convert them into
electrical signals or receive electrical signals and
retransmit them as optical signals.
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. May also refer to the type of GBIC or
SFP. See also long wavelength.
SI. Sequence initiative.
SID. The 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. May 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.
52
IBM TotalStorage
™
SAN Fibre Channel Switch: 3534 Model F08 Installation Guide