Q-Logic SN0054651-00 F manual Path, Point-to-point, Port, QoS

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SANsurfer FC HBA Manager User’s Guide Management Tool for QLogic FC and FCoE Adapters

NIC

Network Interface Controller. A computer circuit board or card that is installed in a computer so that it can be connected to a network.

NPIV

N_Port ID Virtualization. A Fibre Channel facility that allows multiple N_Port IDs to share a single physical N_Port. This allows multiple FC initiators to occupy a single physical port. (See Port.)

NVRAM

NonVolatile Random Access Memory. Memory that stores HBA configuration settings. You can configure adapter settings or restore them from a file. These settings are saved in NVRAM and are retained when power is removed.

ONC

Open Network Computing. A remote procedure call developed by Sun Micro- systems.

Path

A combination of an HBA port and a target port. Note that this is distinct from any internal paths within the fabric network. A fabric network appears to the operating system as an opaque network between the adapter (initiator) and the target port.

Because a path is a combination of an adapter and a target port, a path is distinct from another path if it is accessed through a different adapter and/or it is accessing a different target port. Consequently, when switching from one path to another, the driver might be selecting a different adapter (initiator), a different target port, or both. This makes a difference to the driver when selecting the proper method of failover notification. It can make a differ- ence to the target device, which might have to take different actions when receiving retries of the request from another initiator or on a different port.

Point-to-point

Two FC nodes directly connected (non-loop).

Port

Access point in a device where a link attaches. The four types of ports include:

„N_Port is a FC device port that supports point-to-point topology.

„NL_Port is a FC device port that supports loop topology.

„F_Port is a port in a fabric where an N_Port can attach.

„FL_Port is a port in a fabric where an NL_Port can attach.

QoS

Quality of Service. Service Level Agreement

(SLA) that ensures business continuity when transmitting data over virtual ports by setting priorities and allocating bandwidth.

SAN

Storage Area Network. A high-speed network that interconnects multiple storage units and servers used by a larger network of users.

SN0054651-00 F Glossary-5