NAS gateway


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NAS gateway

A front end to disk storage that is highly scalable. A NAS gateway functions like a diskless file server with unlimited storage. Unlike the traditional "legacy" NAS device, which contains the file sharing protocol for access, the file system for storage and the disks themselves, a NAS gateway contains only the file sharing protocol and the file system.

The front end of the NAS gateway connects to the LAN over Ethernet. The back end connects to a RAID array via Fibre Channel or to a Fibre Channel switch, in which case the NAS gateway becomes a front end to a storage area network (SAN). Single RAID arrays can scale to several terabytes, but switches enable a large number of disk arrays to be attached.

Legacy NAS and NAS Gateways
When a traditional "legacy" NAS runs out of disk space or slows down due to a heavy workload, a new NAS device must be added to the network, and the file references in all the users' machines have to be remapped to the new drives. This administration headache is eliminated with a NAS gateway because it always presents users with a single folder interface to the storage. More storage can be added without reconfiguring anyone's computer. In addition, splitting a NAS system into gateways and disk arrays allows file processing and storage to be scaled independently of each other.

The ONStor Example
In 2003, ONStor (www.onstor.com) introduced NAS gateways that would work with any brand of RAID array and presented a virtual interface to the user. The workload could be redistributed among different NAS gateways without administrative changes in the user machines and without migrating the physical data. See NAS and RAID.


A NAS Gateway
On the right side of this Bobcat NAS gateway from ONStor are two Fibre Channel ports for storage and four Gigabit Ethernet ports for LAN connectivity. The two 10/100 Ethernet sockets on the left are management ports. (Image courtesy of ONStor, Inc., www.onstor.com)















References in periodicals archive ?
NEC Corporation of America (NEC), a provider and integrator of advanced IT, communications, managed services and biometric solutions, revealed on Wednesday that it has added the the M-Series NAS Gateway (NAS-network attached storage) to its storage solution platform.
ONStor's Bobcat Series of NAS Gateways and industry standard storage arrays deliver scalable, shared storage to Windows, UNIX, and Linux clients and servers.
In addition to showcasing its VTrak A-Class with NAS Gateway, PROMISE will feature several new solutions for creative professionals, including Pegasus2 R2+ RAID storage and SANLink2 16G.
ONStor, a provider of scalable clustered NAS solutions for the enterprise, announced on Wednesday (16 July) the launch of the Cougar 6000 series NAS gateway.
ONStor has coupled the Bobcat NAS Gateway with Nexsan Technologies' SATABlade, a Serial ATA (SATA) storage system within a 1 U architecture that maximizes air flow and allows easy access to eight hot-swappable SATA drives.
Virtual Disk Service (VDS) is a key development for WSS 2003 that allows it to be seamlessly deployed as a NAS Gateway to access SAN-based storage resources.
The industry's first open NAS Gateway, IBM TotalStorage Networked Attached Storage 300G, which allows Local Area Network (LAN)-based clients and servers to easily interoperate with an existing Storage Area Network (SAN), leveraging the features and performance of a SAN with the ease and convenience of a NAS product.
lt;p>The Celerra NAS gateway uses the Clariion frame as its back-end.
Worldwide Computer Products News-15 January 2003-New NAS gateway to be released by Spinnaker(C)1995-2003 M2 COMMUNICATIONS LTD http://www.
The first of its kind solution utilizes the Arkeia Network Backup software solution and the Nirvanix CloudNAS[TM], a software application that turns any server into a virtual NAS gateway to the cloud, to provide unlimited, cost effective storage for long term retention of backups and archives.
Delivery of a multifunctional storage system consisting of : - Storage Virtualization Storage Hypervisor : - Midrange storage systems : - NAS Gateway : - Backup & Recovery software and hardware : - File Tiering Appliance : - Object storage / cloud storage system including WORM feature : - SAN switches : and the server infrastructure, including all related services (design, installation, implementation, migration, training, system documentation, and care, maintenance and repair).
TELECOMWORLDWIRE-4 May 2007-ONStor NAS Gateway deployed by Bristol University(C)1994-2007 M2 COMMUNICATIONS LTD http://www.