Qlogic SANsurfer FC HBA Manager, Руководство пользователя, Страница: 143 / 152

SN0054651-00 B Glossary-5
SANsurfer FC HBA Manager User’s Guide
Management Tool for QLogic FC and FCoE Adapters
A
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.
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.
SPIFFI
Specification for platform-independent
failover and failback integration. It is a
cooperative effort that defines a non
vendor-specific failover mechanism.
storage area network
See SAN .
sysfs
A virtual file system provided by the 2.6
Linux kernel. Sysfs exports information
about devices and drivers from the kernel
device model to userspace, and is also
used for configuration.
target
Devices, such an HBA card, which
mediate data in a computer network. The
term
device is used interchangeably with
target and target device . See device .