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Checkpointing for Printer Restart

IP.com Disclosure Number: IPCOM000052959D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Maholick, AW Mize, WN [+details]

Abstract

In computer-connected output printers, when an error is detected by the printer, the host computer will be notified by an appropriate error status indication signal. The host computer will then solicit print job restart recovery information from the printer. Based on the information, the host processor can determine where it must resume transmission in the data that was sent in order to restart the job at the beginning of a new sheet of paper corresponding numerically to the page where the error occurred. If the printer is inoperative, the job may actually be re started on another printer since the information tells the host where to begin retransmission. The host processor insures that the first byte of data retransmitted begins at the specified checkpoint.