HP StorageWorks 2/64 HP StorageWorks Fabric OS 5.x Master Glossary (AA-RW7NA-T - Page 17

intercabinet intermix interswitch link intracabinet IOCTL IOD IP IPI IQN ISC iSCSI iSCSI Gateway Service ISL ISL oversubscription ratio isolated E_Port ISP IU JBOD jitter A specification for copper cabling that allows up to 33-meter distances between cabinets. A service in which Class 2 and Class 3 frames may be delivered to an N_Port that has an open Class 1 dedicated connection. The Class 2 and 3 frames are delivered during times in which there are no Class 1 frames being delivered on the connection. See ISL. A specification for copper cabling that allows up to a 13-meter (42-foot) distance within a single cabinet. I/O control. In-order delivery. A parameter that, when set, guarantees that frames are either delivered in order or dropped. Internet Protocol. The network layer protocol in the TCP/IP communications protocol suite. IP contains a network address and allows messages to be routed to a different network or subnet. IP does not ensure delivery of a complete message; the TCP transport layer provides that guarantee. Intelligent Peripheral Interface. A high-bandwidth interface between a computer and a hard disk or tape device. Devices using IPI can transfer data between the hard drive and RAM in the range 3 to 25 megabytes per second. iSCSI qualified name. Internet Software Consortium. An organization that develops open source resources for Internet protocols. Internet Small Computer Systems Interface. A protocol that defines the processes for transferring block storage applications over TCP/IP networks by encapsulating SCSI commands into TCP and transporting them over the network via IP. The multi-protocol SAN routing service that maps the FCP protocol to the IP transport. This service projects iSCSI hosts onto the backbone fabric of a gateway switch. Interswitch link. A Fibre Channel link from the E_Port of one switch to the E_Port of another. See also cascade and E_Port. The ratio of the number of free ports (non-ISL) to the number of ISLs on a switch. An E_Port that is online but not operational due to overlapping domain IDs or nonidentical parameters (such as E_D_TOVs). See also E_Port. Internet service provider. An organization that provides access to the internet. Information unit. An organized collection of data specified by the FCP to be transferred as a single sequence by the Fibre Channel service interface. See also FCP. Just a bunch of disks. A term for a number of disks connected in a single chassis to one or more controllers. See also RAID. A deviation in timing for a bit stream as it flows through a physical medium. Fabric OS 5.x master glossary 17