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iSR6200 Intelligent Storage Router Installation Guide - QLogic

iSR6200 Intelligent Storage Router Installation Guide - QLogic

iSR6200 Intelligent Storage Router Installation Guide - QLogic

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<strong>iSR6200</strong> <strong>Intelligent</strong> <strong>Storage</strong> <strong>Router</strong><strong>Installation</strong> <strong>Guide</strong>ioctlInput/output control. A system call inUNIX ® /Linux systems that allows an applicationto control or communicate with adevice driver outside usual read/writeoperations.IPInternet Protocol. A method by which datais sent from one computer to another overthe Internet. IP specifies the format ofpackets, also called datagrams, and theaddressing scheme.iSCSIInternet small computer system interface.Protocol that encapsulates data into IPpackets to send over Ethernet connections.iSNSInternet simple name service (iSNS) isused for discovery and management ofIP-based SANs.L_PortLoop port. Does arbitrated loop functionsand protocols. NL_Ports and FL_Ports areexamples of loop-capable ports. SeeE_Port, F_Port, FL_Port, G_Port, N_Port,NL_Port.latencyA measure of how fast a transactiontravels through the router.LEDLight emitting diode. Status indicator on aswitch or other device.light emitting diodeSee LED.LIPLoop initialization process. The initializationprocess in an arbitrated loop thatoccurs when the loop is powered up or anew device is added. One function of a LIPis to assign addresses. All data transmissionon the loop is suspended during a LIP.load balancingA software feature that improves systemperformance by balancing device accessbetween multiple ports for maximumresource efficiency.logical unit numberSee LUN.loop initialization processSee LIP.loopbackDiagnostic tool that routes transmit datathrough a loopback connector back to thesame adapter.LUNLogical unit number, a subdivision of aSCSI target. It is the small integer handlethat differentiates an individual disk driveor partition (volume) within a commonSCSI target device such as a disk array.Technically, a LUN can be a singlephysical disk drive, multiple physical diskdrives, or a portion (volume) of a singlephysical disk drive. However, LUNs aretypically not entire disk drives but rathervirtual partitions (volumes) of a RAID set.Using LUNs, the Fibre Channel host canaddress multiple peripheral devices thatmay share a common controller.maintenance buttonMultifunction momentary switch on thefront panel of the router.ISR651101-00 G Glossary-5

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