Technical data

Fabric OS Administrator’s Guide Glossary-9

Publication Number: 53-0000518-09

I2C Related to internal circuitry on motherboard. [Is this useful?]

idle Continuous transmission of an ordered set over a Fibre Channel link when no data is being transmitted,

to keep the link active and maintain bit, byte, and word synchronization.

in-band Transmission of management protocol over the Fibre Channel.

initiator A server or workstation on a Fibre Channel network that initiates communications with storage devices.

See also “target”.

Insistent

Domain ID

Mode

Sets the domain ID of a switch as insistent, so that it remains the same over reboots, power cycles,

failovers, and fabric reconfigurations. This mode is required to support FICON® traffic.

interswitch

link

See “ISL”.

IOCTL I/O control.

IP Internet Protocol. The addressing part of TCP.

ISL Interswitch link. A Fibre Channel link from the E_Port of one switch to the E_Port of another. See also

“E_Port”.

isolated

E_Port

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”.

IU Information unit. A set of information as defined by either an upper-level process protocol definition or

upper-level protocol mapping.

JBOD “Just a bunch of disks.” Indicates a number of disks connected in a single chassis to one or more

controllers. See also “RAID”.

K28.5 A special 10-bit character used to indicate the beginning of a transmission word that performs Fibre

Channel control and signaling functions. The first seven bits of the character are the comma pattern.

key A string of data (usually a numeric value) shared between two entities and used to control a

cryptographic algorithm. Usually selected from a large pool of possible keys to make unauthorized

identification of the key difficult. See also “key pair”.

key pair In public key cryptography, a pair of keys consisting of an entity's public and private key. The public

key can be publicized, but the private key must be kept secret. See also “public key cryptography”.