Search	Meetings & Discussions	Tools for Members
Clinical Trials Drugs Grants Legal Proceedings Medical Devices News Releases Patents ^Popular! Publications SEC Filings Trademarks People Companies	Post a Meeting Search Meetings Discussions	View Your Profile Edit Your Profile Edit Your Work Portfolio Your Innovation Network Your Alerts Your Lists Your Newsfeeds Your Search History Your Messages Q&A

Interface adaptor emulating magnetic tape drive

Filing Information

Patent Number: US4727512
Application Number: US6678650
Filing date: 12/06/1984
Issue date: 02/23/1988
Predicted expiration date: 02/23/2005

Explore Your Innovation Network™ for an introduction to:

Inventor(s): David A. Birkner · Mark A. Sankey ·
Assignee(s): Computer Design & Applications, Inc. · View assignee updates
Attorney/Agent(s): David W. Gomes ·
Primary Examiner: Raulfe B. Zache ·
Assistant Examiner: Michael J. Ure ·

U.S. Classifications: 364/900 ·
International Classifications: G06F 304 ·
International Classifications: 364200;900;200 MS File;900 MS File ·
View document at: (opens new window):
USPTO · PAIR · esp@cenet · Patent Family
* Related patent documents may or may not exist on these sites

Abstract

A magnetic tape drive emulator provides interface compatibility between a computer system having an industry standard tape drive interface and a peripheral image acquisition processing system. The emulator receives signals that are normally applied to a magnetic tape drive system and converts them into data signals which are formatted for general access by the image acquisition processing system. In addition, the magnetic tape drive emulator converts signals generated by the peripheral processing system into data signals which are formatted for access by the computer system through the standard tape drive interface.

References Cited

U.S. Patent Documents

Document Number	Assignees	Inventors	Issue/Pub Date
US3290654	RCA CORP	Rettig et al.	Dec 1966
US4004277	GAVRIL BRUCE D	Garvil	Jan 1977
US4511963	International Business Machines Corp.	Kantner	Apr 1985

Referenced By

Document Number	Assignee	Inventors	Issue/Pub Date
US7426617	Network Appliance, Inc.	Roger Keith Stager et al.	Sep 2008
US5592645	Framdrive	Michael E. Thomas	Jan 1997
US5592643	Framdrive	Michael E. Thomas	Jan 1997
US5592646	Framdrive	Michael E. Thomas	Jan 1997
US5598577	Dell USA, L.P.	Anthony L. Overfield	Jan 1997
US5455926	Data/Ware Development, Inc.	Richard V. Keele et al.	Oct 1995
US6141702	Sony Corporation of Japan	Harold Aaron Ludtke et al.	Oct 2000
US6606589	Database Excelleration Systems, Inc.	George B. Tuma et al.	Aug 2003
US4847805	NEC Corporation	Yasunori Ishii et al.	Jul 1989
US4947367	EMC Corporation	Christopher Y. Chang et al.	Aug 1990
US5765200	International Business Machines Corporation	James Elkins McIlvain et al.	Jun 1998
US7436957	FISCHER ADDISON M	Addison M. Fischer et al.	Oct 2008
US7454529	Netapp, Inc.	Roger Keith Stager et al.	Nov 2008
US5297124	Miltope Corporation	Barry Plotkin et al.	Mar 1994
US5592642	Framdrive	Michael E. Thomas	Jan 1997
US5594883	International Business Machines Corporation	Wilbur D. Pricer	Jan 1997
US6757842	SanDisk Corporation	Eliyahou Harari et al.	Jun 2004
US7437387	Netapp, Inc.	Gavin David Cohen et al.	Oct 2008
US5604881	Framdrive	Michael E. Thomas	Feb 1997
US6128698	Exabyte Corporation	Steven P. Georgis	Oct 2000
US6389503	Exabyte Corporation	Steve Georgis et al.	May 2002
US7401198	NetApp	Craig Anthony Johnston et al.	Jul 2008
US7567993	Netapp, Inc.	Don Alvin Trimmer et al.	Jul 2009
US7581118	Netapp, Inc.	William P. McGovern	Aug 2009
US5070474	Disk Emulation Systems, Inc.	George B. Tuma et al.	Dec 1991
US5404492	Helios Incorporated	Alex Moraru et al.	Apr 1995
US5359726	THOMAS MICHAEL E	Michael E. Thomas	Oct 1994
US6055602	International Business Machines Corporation	James Elkins McIlvain et al.	Apr 2000
US7127388	Advanced Digital Information Corporation	Neville Yates et al.	Oct 2006
US7559088	NETAPP, Inc.	Gavin David Cohen et al.	Jul 2009
US7487009	Netapp, Inc.	Don Alvin Trimmer et al.	Feb 2009
US5465364	International Business Machines, Inc.	Frederick L. Lathrop et al.	Nov 1995
US5581740	Dell USA, L.P.	Craig S. Jones	Dec 1996
US6304925	Synchrome Technology Inc.	Faan-Hoan Liu et al.	Oct 2001
US6374389	Solid Data Systems, Inc	George B. Tuma et al.	Apr 2002
US7397713	SanDisk Corporation	Eliyahou Harari et al.	Jul 2008
US5802398	Synchrome Technology, Inc.	Faan-Hoan Liu et al.	Sep 1998
US6149316	SanDisk Corporation	Eliyahou Harari et al.	Nov 2000
US6496791		Neville Yates et al.	Dec 2002
US6571205	Nortel Networks Limited	Jody Michel Doucet et al.	May 2003
US6914846	SanDisk Corporation	Eliyahou Harari et al.	Jul 2005
US6763480	SanDisk Corporation	Eliyahou Harari et al.	Jul 2004
US7490103	NetApp, Inc.	Roger Keith Stager et al.	Feb 2009
US5592644	Framdrive	Michael E. Thomas	Jan 1997
US5438674	Data/Ware Development, Inc.	Richard V. Keele et al.	Aug 1995
US6684345	SanDisk Corporation	Eliyahou Harari et al.	Jan 2004
US6523132	SanDisk Corporation	Eliyahou Harari et al.	Feb 2003
US7325159	Network Appliance, Inc.	Roger Keith Stager et al.	Jan 2008
US7437492	Netapp, Inc	Roger Stager et al.	Oct 2008
US7315965	Network Appliance, Inc.	Roger Keith Stager et al.	Jan 2008
US5218691	Disk Emulation Systems, Inc.	George B. Tuma et al.	Jun 1993
US5555402	Database Excelleration Systems, Inc.	George B. Tuma et al.	Sep 1996
US5588140	Computer Network Technology Corporation	Eugene D. Misukanis et al.	Dec 1996
US5717956	Fujitsu Limited	Tsutomu Shinosaka et al.	Feb 1998
US7406488	NetApp	Roger Keith Stager et al.	Jul 2008
US7526620	Netapp, Inc.	William P. McGovern	Apr 2009
US7558839	Netapp, Inc.	William P. McGovern	Jul 2009

Patent Family

The current document is not in a family.

Read Patent

Read patent

View Drawings

Independent Claims | See all claims (4)

1. A magnetic tape drive emulator for use with a computer system having industry standard tape drive interface and peripheral image processing system, said magnetic tape drive emulator comprising:(A) receivers and terminators for receiving data signals and control signals present on an industry standard tape drive interface:(B) a write data register connected to said receivers and terminators for receiving said data signals;(C) a drive control register connected to said receivers and terminators for receiving said control signals; and(D) a processing unit connected to said write data register and said drive control register for converting said data signals into an image processing system signal format,wherein said processing unit includes:(a) a test multiplexer connected to said drive control register for receiving signals at the output thereof;(b) a micro sequencer connected to said test multiplexer for receiving signals at the output thereof;(c) a control store connected to said micro sequencer, a feedback signal generated by said control store applied to said micro sequencer; and(d) an arithmetic logic unit connected to said control store and said test multiplexer, write data signals generated by said write data register being applied to said arithmetic logic unit, said write data signals converted in said arithmetic logic unit into an image processing system format.
4.4. A magnetic tape drive emulator for use with a computer system having an industry standard tape drive interface and peripheral image processing system, said magnetic tape drive emulator comprising:(a) receivers and terminators for receiving data and control signals presented on an industry standard tape drive interface;(b) a write data register connected to said receivers and terminators for receiving said data signals;(c) a drive control register connected to said receivers and terminators for receiving said control signals;(d) a test multiplexer connected to said drive control register for receiving signals at the output thereof;(e) a micro sequencer connected to said test multiplexer for receiving signals at the output thereof;(f) a control store connected to said micro sequencer, a feedback signal generated by said control store applied to said micro sequencer;(g) an arithmetic logic unit connected to said control store and said test multiplexer, write data signals generated by said write data register being applied to said arithmetic logic unit, said write data signals converted in said arithmetic logic unit into an image processing system format;(h) a register file and data buffer for receiving said image processing system format data signals;(i) said arithmetic logic unit also converting image processing system data signals and control signals into computer system format;(j) a read data register for receiving said signals converted into said computer system format;(k) a read clock generator connected to said read data register for controlling the operation thereof;(l) a read data encoder connected to said read data register and read clock generator for encoding data signals generated by said read data register;(m) a drive status register for receiving signals representing the status of the computer system; and(n) driver means connected to said read data encoder and said drive status register for presenting said computer system format data signals to the standard tape drive interface when said computer system is available to receive said computer system format data signals.

	Your First Name:	Last Name:
	Already a member? Sign In