HP StorageWorks XPath OS 7.4.X Command Reference Guide (AA-RVHCC-TE, September 2005)

XPath OS 7.4.x command reference guide 299
striping A RAID technique for writing a file to multiple disks on a block-by-block basis, with or without
parity.
switch A fabric device providing bandwidth and high-speed routing of data through link-level
addressing.
switch name The arbitrary name assigned to a switch.
switch port A port on a switch. Switch ports can be E_Ports, F_Ports, or FL_Ports.
switch-to-switch
authentication
The process of authenticating both switches in a switch-to-switch connection using digital
certificates. See also authentication, digital certificate.
SWL Short wavelength. A type of fiber optic cabling that is based on 850-mm lasers and supports
1.0625 GB/s-link speeds. SWL can also refer to the type of GBIC or SFP. See also LWL.
syslog Syslog daemon. Used to forward error messages.
T10 A standards committee chartered with creating standards for SCSI.
T11 A standards committee chartered with creating standards for Fibre Channel.
tachyon A chip that supports FC-0 through FC-2 on a single chip.
target A storage device on a Fibre Channel network. See also initiator.
TC Track changes.
TCP/IP Transmission Control Protocol/Internet Protocol.
Telnet A virtual terminal emulation used with TCP/IP. Telnet is sometimes used as a synonym for the
Fabric OS CLI.
tenancy The time from when a port wins arbitration in a loop until the same port returns to the
monitoring state. Also referred to as loop tenancy.
throughput The rate of data flow achieved within a cable, link, or system. Usually measured in bps (bits
per second). See also bandwidth.
tiering The process of grouping particular SAN devices by function and then attaching these devices
to particular switches or groups of switches based on that function.
Time Server A Fibre Channel service that allows for the management of all timers.
topology As it applies to Fibre Channel technology, the configuration of the Fibre Channel network and
the resulting communication paths allowed. There are three possible topologies:
• Point to point—A direct link between two communication ports.
• Switched fabric—Multiple N_Ports linked to a switch by F_Ports.
• Arbitrated loop—Multiple NL_Ports connected in a loop.
TPC Third-party copy. A protocol for performing tape backups without using server resources.
track changes A Fabric OS feature that can be enabled to report specific activities (for example, logins,
logouts, and configuration task changes). The output from the track-changes feature is dumped
to the error log for the switch.
transceiver A device that converts one form of signaling to another for transmission and reception; in fiber
optics, optical to electrical.
Translative Mode A mode in which private devices can communicate with public devices across the fabric.
transmission
character
A 10-bit character encoded according to the rules of the 8b/10b algorithm.
transmission word A group of four transmission characters.
trap (SNMP) The message sent by an SNMP agent to inform the SNMP management station of a critical
error. See also SNMP.
trunking In Fibre Channel technology, a feature that enables distribution of traffic over the combined
bandwidth of up to four ISLs between adjacent switches, while preserving in-order delivery.
trunking group A set of up to four trunked ISLs.
trunking ports The ports in a set of trunked ISLs.