HP StorageWorks 2/64 HP StorageWorks Fabric OS 5.x Master Glossary (AA-RW7NA-T - Page 22

OLS OLTP ON OPN ordered set originator out-of-band oversubscription OX_ID packet PAL parallel Participating Mode passive copper path selection payload PBC Primitive sequence offline. A primitive sequence that is used during link initialization between two N_Ports in a point-to-point topology or an N_Port and an F_Port in a Fabric topology. It is sent to indicate that the transmitting port is attempting to initialize the link, has recognized the NOS primitive sequence, or is going offline. Online transaction processing. Online updating of the appropriate database records as soon as a transaction is entered. Offline notification. A term that refers to an ELS field that appears in portLogDump command output. Open primitive signal. Applies only to arbitrated loops; sent by an L_Port that has won the arbitration process to open communication with one or more ports on the loop. A transmission word that uses 8b/10b mapping and begins with the K28.5 character. Ordered sets are used to differentiate Fibre Channel control information from data frames and to manage frame transport. They occur outside of frames and include the following items: • Frame delimiters, which mark frame boundaries and describe frame contents • Primitive signals, which indicate events • Primitive sequences, which indicate or initiate port states The Nx_Port that originated an exchange. Transmission of management protocol outside of the Fibre Channel network, usually over Ethernet. A situation in which more nodes could potentially contend for a resource than the resource (typically an ISL) could simultaneously support. Oversubscription could be a desirable attribute in fabric topology, as long as it does not produce unacceptable levels of congestion. Originator ID or exchange ID. A term that refers to the exchange ID assigned by the originator port. A block of data that is transmitted over the network in a packet-switched system. The terms packet, frame, and datagram are often used synonymously. See also frame. Programmable Array Logic. A relatively small FPD. A term that refers to the simultaneous transmission of data bits over multiple lines. A mode in which an L_Port in a loop has a valid AL_PA and can arbitrate, send frames, and retransmit received transmissions. See also L_Port and Nonparticipating Mode. A low-cost copper Fibre Channel connection, allowing distances up to 13 meters between devices. The selection of a transmission path through the fabric. HP switches use the FSPF protocol. See also FSPF. The portion of a Fibre Channel frame that contains the information being transported by the frame. There are many different payload formats, which are based on protocol. Port bypass circuit. A circuit in hubs or a disk enclosure that opens or closes a loop to add or remove nodes. 22 Glossary