Q-Logic 8200 Manuel D’Utilisation

SN0054671-00  A

 Glossary-3

User’s Guide Converged Network Adapter

8200 and 3200 Series Adapters

A subdivision of a SCSI target. It is the 
small integer handle that differentiates an 
individual disk drive or partition (volume) 
within a common SCSI target device such 
as a disk array.
Technically, a LUN can be a single 
physical disk drive, multiple physical disk 
drives, or a portion (volume) of a single 
physical disk drive. However, LUNs are 
typically not entire disk drives but rather 
virtual partitions (volumes) of a RAID set.
Using LUNs, the Fibre Channel host can 
address multiple peripheral devices that 
may share a common controller.

Diagnostic tool that routes transmit data 
through a loopback connector back to the 
same adapter.

One of two PCI-defined extensions to 
support message signaled interrupts 
(MSI), in PCI 2.2 and later and PCIe. MSIs 
are an alternative way of generating an 
interrupt through special messages that 
allow emulation of a pin assertion or 
deassertion.
MSI-X (defined in PCI 3.0) allows a device 
to allocate any number of interrupts 
between 1 and 2048 and gives each inter-
rupt separate data and address registers. 
Optional features in MSI (64-bit 
addressing and interrupt masking) are 
mandatory with MSI-X.

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

Node port. A port that connects by a 
point-to-point link to either a single N_Port 
or a single G_Port. N_Ports handle 
creation, detection, and flow of message 
units to and from the connected systems. 
N_Ports are end ports in virtual 
point-to-point links through a fabric, for 
example N_Port to F_Port to F_Port to 
N_Port using a single Fibre Channel fabric 
switch.

The ability for a single physical Fibre 
Channel end point (N_Port) to support 
multiple, uniquely addressable, logical end 
points. With NPIV, a host Fibre Channel 
adapter is shared in such a way that each 
virtual adapter is assigned to a virtual 
server and is separately identifiable within 
the fabric. Connectivity and access privi-
leges within the fabric are controlled by 
identification of each virtual adapter and, 
hence, the virtual server using each virtual 
adapter.

A type of memory that retains data (config-
uration settings) even when power is 
removed. You can manually configure 
NVRAM settings or restore them from a 
file.

A path to a device is a combination of an 
adapter port instance and a target port as 
distinct from internal paths in the fabric 
network. A fabric network appears to the 
operating system as an opaque network 
between the adapter (initiator) and the 
target.