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To: Glenn Perry who wrote (3831)	11/16/1998 11:42:00 AM
From: killybegs	Read Replies (2) \| Respond to of 17679

this is from a DTV newsgroup re Fiber Channel To: OpenDTV Mail List <OpenDTV@pcube.com> From: Craig Birkmaier <craig@pcube.com> Subject: New Fibre Channel Storage Switch technology Sender: owner-opendtv@pcube.com The giant Comdex show invades Las Vegas this week. More than just a showcase for the PC industry, many companies are rolling out new computer infrastructure products at the show. One area of computing infrastructure that is of immense interest to broadcasters and dynamic media production facilities, is Fibre Channel. Fibre Channel burst onto the scene a few years ago, but to date has not taken the video industry by storm--there are hundreds of vendors committed to the technology, but product deployment has been slowed by high prices and delays in finishing up technical standards like FCAV, that optimize Fibre Channel for video applications. Most of the interest in Fibre Channel to date has been in one class of service known as arbitrated loop. FCAL is used primarily for disk connect, providing very large storage arrays. In this it competes with traditional SCSI interconnect schemes and the serialized version of SCSI, SSA. One of Fibre Channels main advantages over SSA and other networking technologies is that it offeres a variety of interconnect services, including hubs and switches, which allow the creation of a switched fabric, linking together clients and storage across large infrastructures such as an educational or corporate campus, or a large video facility such as a television network. Fibre Channel switch technology has been prohibitively expensive compared to more traditional approaches, but that picture is beginning to change. Also, the FCAV spec is nearing completion. We can expect to see some significant Fibre Channel product introductions at NAB. Gadzoox is not waiting til next year. At Comdex they will introduce a new switch technology that may bring Fibre Channel "fabric" solutions into the mainstream. Regards Craig Birkmaier Pcube Labs New Gadzoox Switch Speeds Storage Throughput (11/15/98 11:58 a.m. ET) By Chuck Moozakis, InternetWeek Gadzoox Networks next week will preview a Fibre Channel switch that is designed to pierce the wall between arbitrated loop and switched fabric storage area network (SAN) topologies. Its Storage Switch Technology, slated for release early next year with a per-port price tag that is about half of current backbone-switch devices, will support concurrency and zoning, according to Dave Tang, Gadzoox's vice president of marketing. A third capability, dubbed "diplex" communications, enables the concurrent transmission and receipt of data from two different nodes. Concurrency lets the new switches mimic switched fabric topologies, thus letting all devices share Fibre Channel's 100 megabyte-per-second throughput simultaneously. In an arbitrated loop, which can support up to 126 devices, only two nodes have high-speed access at any one time. Storage Switch Technology, according to Tang, will eliminate the need and resulting delay of arbitrating between all the ports. For the rest of the story see: techweb.com