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Improved Diskette Save/ Restore

IP.com Disclosure Number: IPCOM000049212D
Original Publication Date: 1982-May-01
Included in the Prior Art Database: 2005-Feb-09

Publishing Venue

IBM

Related People

Authors:
Pertzborn, JJ [+details]

Abstract

A RESTORE operation in the IBM System/38 using a diskette takes three revolutions per physical cylinder: one revolution to perform the seek from the previous cylinder (single-track seek), and two revolutions to read the data (one revolution per side). A SAVE operation requires five revolutions per physical cylinder: one revolution to perform the seek from the previous cylinder (single-track seek), two revolutions to write the data (one revolution per side), and two revolutions to verify (CRC check) the data (one revolution per side).