IBM 990 manual PTF. See program temporary fix

6947glos.fm Draft Document for Review April 7, 2004 6:15 pm

original equipment manufacturers information (OEMI). A reference to an IBM guideline for a computer peripheral interface. More specifically, refer to IBM S/360 and S/370 Channel to Control Unit Original Equipment Manufacture’s Information. The interfaces uses ESA/390 logical protocols over an I/O interface that configures attached units in a multi-drop bus environment.

parallel channel. A channel having a System/360™ and System/370™ channel-to-control-unit I/O interface that uses bus and tag cables as a transmission medium. Contrast with ESCON channel.

path group. The ESA/390 and z/Architecture term for a set of channel paths that are defined to a controller as being associated with a single S/390 image. The channel paths are in a group state and are online to the host.

path. In a channel or communication network, any route between any two nodes. For ESCON or FICON, this would be the route between the channel and the control unit/device, or sometimes from the operating system control block for the device and the device itself.

path-group identifier. The ESA/390 term for the identifier that uniquely identifies a given LPAR. The path-group identifier is used in communication between the system image program and a device. The identifier associates the path-group with one or more channel paths, thereby defining these paths to the control unit as being associated with the same system image.

PCICC. (IBM’s) PCI Cryptographic Coprocessor.

physical channel identifier (PCHID). A value assigned to each physically installed and enabled channel in the CPC that uniquely identifies that channel to the system (for the IBM z990, the assigned PCHID values are between 000 and 6FF)

port address. In an ESCON Director or a FICON Director, an address used to specify port connectivity parameters and to assign link addresses for attached channels and control units. See also link address.

port card. In an ESCON or FICON environment, a field-replaceable hardware component that provides the optomechanical attachment method for jumper cables and performs specific device-dependent logic functions.

port name. In an ESCON Director or a FICON Director, a user-defined symbolic name of 24 characters or less that identifies a particular port.

port. (1) An access point for data entry or exit. (2) A receptacle on a device to which a cable for another device is attached. (3) See also duplex receptacle.

processor complex. A system configuration that consists of all the machines required for operation; for example, a processor unit, a processor controller, a system display, a service support display, and a power and coolant distribution unit.

program temporary fix (PTF). A temporary solution or bypass of a problem diagnosed by IBM in a current unaltered release of a program.

prohibited. In an ESCON Director or FICON Director, the attribute that, when set, removes dynamic connectivity capability. Contrast with allowed.

protocol. (1) A set of semantic and syntactic rules that determines the behavior of functional units in achieving communication. (2) In SNA, the meanings of and the sequencing rules for requests and responses used for managing the network, transferring data, and synchronizing the states of network components. (3) A specification for the format and relative timing of information exchanged between communicating parties.

PTF. See program temporary fix.

route. The path that an ESCON frame or FICON frame (fibre channel frame) takes from a channel through an ESCON Director or FICON Director to a control unit/device.

saved configuration. In an ESCON or FICON environment, a stored set of connectivity attributes whose values determine a configuration that can be used to replace all or part of the ESCON Director's or FICON Director’s active configuration. Contrast with active configuration.

SC Connector. An optical fibre cable duplex connector that terminates both jumper cable fibres into one housing and provides physical keying for attachment to an LC duplex receptacle. For technical details, see the NCITS - American National Standard for Information Technology - Fibre Channel Standards document FC-PI.

Self-Timed Interconnect (STI). An interconnect path cable that has one or more conductors that transit information serially between two interconnected units without requiring any clock signals to recover that data. The interface performs clock recovery independently on each serial data stream and uses information in the data stream to determine character boundaries and inter-conductor synchronization.

service element (SE). A dedicated service processing unit used to service a S/390 machine (processor).

258IBM eServer zSeries 990 Technical Guide