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Record Multiplexing in Data Storage System

IP.com Disclosure Number: IPCOM000038935D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Fry, SM Hempy, HO [+details]

Abstract

A system is described for record multiplexing, especially adapted for use in a tape storage system, where data is to be transferred in blocks between a channel and storage devices under the control of a control unit which includes a buffer. The operational speed of the channel is greater than the speed of the storage device by a factor of at least twenty percent. The system operates to decrease the utilization time of the faster device, i.e., the channel. This is accomplished by controlling block transfers so that a transfer from the device to the channel begins only if the buffer contains sufficient blocks of data so that the total transfer can be completed by the faster operation of the channel before data within the buffer is exhausted.