Qlogic SANsurfer iSCSI HBA Manager, Руководство пользователя

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IS0054602-00 B Glossary-5
SANsurfer iSCSI HBA Manager User’s Guide
Management Tool for QLogic iSCSI Host Bus Adapters
A
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.
nonvolatile random access memory
See NVRAM .
NVRAM
Nonvolatile random access memory. HBA
configuration settings are stored in
NVRAM. You can configure HBA 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 proce-
dure call developed by Sun Microsystems.
open network computing
See ONC .
path
A path to a device is a combination of a
QLA2 xxx 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 HBA (initi-
ator) and the target port.
Because a path is a combination of an
HBA and a target port, a path is distinct
from another path if it is accessed through
a different HBA and/or it is accessing a
different target port. Consequently, when
switching from one path to another, the
driver might be selecting a different HBA
(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 difference 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.
path MTU
Path maximum transmission unit. The
smallest MTU of any of the
IP hops of the
“path” between a source and destination in
an Internet transmission path. The path
MTU is the largest packet size that
traverse this path without suffering
fragmentation.
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.
SAN
Storage area network, which consists of
multiple storage units and servers
connected by networking topology.
SCSI
Small computer system interface. The
original SCSI specification was a hardware
bus specification and a packet-oriented
protocol specification for communicating
on that bus. SCSI over FC uses the
packet-oriented protocol to communicate
with storage devices on the FC.