arbitrated loop


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arbitrated loop

A ring topology used in Fibre Channel. Up to 127 devices may be attached in the loop, but only two can communicate at the same time, reflecting the channel nature of Fibre Channel technology. To communicate with a device several hops down the ring, each device repeats the data to its adjacent node. See Fibre Channel.


Arbitrated Loop
This ring topology is widely used and can connect up to 127 nodes without using a switch. All devices share the bandwidth, and only two can communicate with each other at the same time, with each node repeating the data to its adjacent node. TX means transmit, and RX means receive.
References in periodicals archive ?
The VSP is the first enterprise storage system that has converted to Serial Attached SCSI for faster, point-to-point, performance and availability over conventional FC Arbitrated Loop disk connections and introduced small form factor 2.5 inch disks which consume less than half the power of conventional 3.5 inch disks.
The Ultrastar 15K600 is a 15,000RPM 3.5" 6Gb/s SAS or 4Gb/s Fibre Channel Arbitrated Loop (FCAL) device and is available in 300GB, 450GB and 600GB capacities.
Today, the FC arbitrated loop link supports up to 126 devices and operates at a rate of 4Gb/s, FC is also designed to support both copper and optical interconnect, and, when operated in fabric mode supports complex storage networking applications.
The most prominent Fibre Channel standard is Fibre Channel Arbitrated Loop (FC-AL).
(NYSE:A) has announced the results of a successful 4 Gb/s Fibre Channel Arbitrated Loop (FCAL) interoperability test.
Fibre Channel supports various physical topologies, including point-to-point, arbitrated loop (FC-AL) and switched fabric.
With the SilkWorm 12000, Brocade will offer the industry's most comprehensive zoning, supporting zone configuration based on industry-standard worldwide names, port ID, Logical Unit Name (LUN), and AL_PA (Arbitrated Loop Physical Address).
Compaq says the Raid Array 8000 and Enterprise Storage Array 12000 product lines will support 32-bit NT on AlphaServers in Fibre Channel Arbitrated Loop (FCAL) configurations through service pack 6.
Additionally, expanders enable SAS storage solutions comparable to fiber channel arbitrated loop with many of the performance characteristics of fiber channel switch implementations, but at a lower cost.
ADIC's own hardware platforms and software applications provide direct support for SCSI, iSCSI, Fibre Channel fabric and arbitrated loop protocols, with development programs in place for other SAN and NAS technologies.
Part of Ciprico's Fibre Channel disk array line, the NETarray 1000 product uses dual Fibre Channel Arbitrated Loop (FC-AL) technology - allowing two loop configurations inside a single enclosure.
Besides the popular arbitrated loop configuration, Fibre Channel may be used tn a switched fabric, linking as many as 224 ports.