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Technology Stocks : The New QLogic (ANCR)

QLGC 16.07

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Aug 24 5:00 PM EST

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To: Craig Stevenson who wrote (18495)	10/12/1998 7:26:00 AM
From: KJ. Moy	Read Replies (1) of 29386

Craig, ESCON is the preferred channel option for IBM mainframes for at least 10 years as far as I can remember. It is basically a serial interface using fiber. ESCON is a standard but used primarily by IBM mainframes(or clones such as Amdahl) connecting storage devices and communication controllers. Companies such as CMNT also provide ESCON interface if I am not mistaken. ESCON directors provide flexibility and channel management for the big iron. It basically provide a matrix mapping logical/physical channels together. When channel changes are needed, it is big pain to do in I/O gen from the mainframe side. It would be much easier to just re-map them from the ESCON director level. How much is an ESCON director? I don't know. It is not cheap. It depends how many channels it can handle. FC switches will be an integral part of enterprise computing to provide flexibility, scalability and performance. The number of FC switches needed will be mind boggling. It is like when gig drives first came out. People realized it was more like a necessilty rather than a luxury. Everybody buying PC now would 'need' a multi-gig drive. It would be the same phenominon with mainframe/FC IMO. KJ

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