HP StorageWorks Fabric OS 5.X Master Glossary (AA-RW7NA-TE, September 2005)

intercabinet Aspecification for cop per cabling that allows up to 33-meter distances between
cabinets.
intermix A service in which Class 2 and Class 3 frames may be delivered to an N_Po rt
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.
interswitch link See ISL.
intracabinet Aspecification for co pper cabling that allows up to a 13-meter (42-foot)
distance within a single cabinet.
IOCTL I/O control.
IOD In-order delivery. A parameter that, when set, guarantees that frames are either
delivered in order or dropped.
IP Internet Protocol. The net work layer protocol in the TCP/IP co mmunications
protocol suite. IP contains a network address and allows messages to be routed
to a different net work or subnet. IP do es not ensure delivery of a complete
message; the TCP transport layer provides that guarantee.
IPI 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 R AM in the range 3 to 25 megabytes per s
econd.
IQN iSCSI qualified name.
ISC Internet Soft ware Consortium. An organization that develops open source
resources for Internet protocols.
iSCSI 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 net work
via IP.
iSCSI Gateway
Ser vice
The multi-protocol SAN routing service that maps the FCP protocol to the IP
transport. This ser vice projects iSCSI hosts onto the backbone fabric of a
gateway switch.
ISL Interswitch link. A Fibre Channel link fro m the E_Port of one switch to the E_Port
of another.
See also cascade and E_Por t.
ISL
oversubscription
ratio
Theratioofthenumberoffreeports(non-ISL)tothenumberofISLsonaswitch.
isolated E_Por t An E_Port that is online but not operational due to overlapping domain I Ds or
nonidentical parameters (such as E_D_TOVs).
See also E_Port.
ISP Intern
et service provider. An organization that provides access to the internet.
IU 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.
JBOD 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.
jitter A deviation in timing for a bit stream as it flows through a phys
ical medium.
Fabric OS 5.x master glossary
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