HP StorageWorks XPath OS 7.4.X Administrator Guide (AA-RVHDD-TE, February 2006)
XPath OS 7.4.x administrator guide 111
ISL
Interswitch link. A Fibre Channel link from the E_Port of one switch to the E_Port of another. See also E_Port.
JBOD
Just a bunch of disks. A number of disks connected in a single chassis to one or more controllers. See also
RAID.
L_Port
Loop port. A node port (NL_Port) or fabric port (FL_Port) that has arbitrated-loop capabilities. An L_Port can
be in either Fabric Mode or Loop Mode.
LAN
Local area network. A network in which transmissions typically take place over fewer than 5 kilometers
(3.4 miles).
latency
The time required to transmit a frame. Together, latency and bandwidth define the speed and capacity of a
link or system.
Link Services
A protocol for link-related actions.
login server
The unit that responds to login requests.
LSAN
Logical storage area network. An LSAN enables device and storage connectivity that spans two or more
fabrics. The path between devices in an LSAN can be local to a fabric or cross one or more FC routers and
one or more backbone fabrics.
LSAN zone
The mechanism by which LSANs are administered. An FC router attached to two fabrics listens for the
creation of matching LSAN zones on both fabrics. If this occurs, it creates phantom domains and FC-NAT
entries as appropriate, and inserts entries for them into the name servers on the fabrics. LSAN zones are
compatible with all standard zoning mechanisms.
Mbit/sec
Megabits per second.
meta-SAN
The collection of all devices, switches, edge and backbone fabrics, LSANs, and FC routers that make up a
physically connected but logically partitioned storage network. LSANs span between edge fabrics using
FC routers. In a data network, this would simply be called the network. However, an additional term is
required to specify the difference between a single-fabric network (SAN), a multifabric network without
cross-fabric connectivity (dual-redundant fabric SAN), and a multifabric network with connectivity
(meta-SAN).
metric
A relative value assigned to a route to aid in calculating the shortest path (1000 at 1 Gbit/sec, 500 at
2Gbit/sec).