Resumes
Resumes
Glenn Hotchkin Phones & Addresses
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26682 Carranza Dr, Mission Viejo, CA 92691 (949) 859-6828 (949) 916-2174
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San Juan Capistrano, CA
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El Toro, CA
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Irvine, CA
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Kramer Junction, CA
Publications
Us Patents
Controlling An Apparatus Disposed For Adapting Fiber Channel Transmissions To An Industry Standard Data Bus
View pageUS Patent:
57272182, Mar 10, 1998
Filed:
Mar 5, 1996
Appl. No.:
8/611141
Inventors:
Glenn Thomas Hotchkin - Mission Viejo CA
Assignee:
Unisys Corp. - Blue Bell PA
International Classification:
G06F 1300
US Classification:
395733
Abstract:
The present invention operates in a file server having a peripheral storage subsystem coupled thereto by means of a fibre channel. The file server includes an apparatus disposed between the file server and the storage subsystem for adapting fibre channel transmissions to and from an industry standard data bus of the file server. The apparatus includes a microprocessor executing a method comprising the following steps. Sensing if an interrupt has occurred by the file server, and if so, determining the condition of the interrupt by the file server and handling it. If an interrupt has not occurred, testing an interface between the fibre channel and the apparatus to assure connectivity of the fibre channel. Next, sense for an action to be taken in response to the interrupt, and if so attempt to take appropriate action. If no action is to be taken, sense if an action is to be taken for communications with the file server, and if so, attempt to take the appropriate action, and if not; sense if a previously queued mailbox action is pending, and if so, check to determine if the doorbell register is empty, and if so load the mailbox registers and the doorbell register.
System For Regulating Data Transfer Operations
View pageUS Patent:
46444637, Feb 17, 1987
Filed:
Aug 12, 1985
Appl. No.:
6/764520
Inventors:
Glenn T. Hotchkin - El Toro CA
David J. Mortensen - Mission Viejo CA
Jayesh V. Sheth - El Toro CA
David J. Mortensen - Mission Viejo CA
Jayesh V. Sheth - El Toro CA
Assignee:
Burroughs Corporation - Detroit MI
International Classification:
G06F 900
US Classification:
364200
Abstract:
A peripheral-controller (called a Data Link Processor) optimizes the rate of data transfers between a host computer and magnetic tape peripherals by use of a block counter sensing system for monitoring the occupation-status of word-blocks in a buffer memory. The peripheral-controller provides Automatic Read/Write Logic for buffer-peripheral tape transfers and a burst mode routine for rapid host-buffer transfers of data words. The sensing system provides means to inform a microcode sequencer when certain action routines should be executed in order to maintain steady error-free data transfer operations which minimize the need for retries of data transfer cycles previously initiated.
Method For Controlling The Expansion Of Connections To A Scsi Bus
View pageUS Patent:
56110561, Mar 11, 1997
Filed:
Dec 4, 1995
Appl. No.:
8/566479
Inventors:
Glenn T. Hotchkin - Mission Viejo CA
Assignee:
Unisys Corporation - Blue Bell PA
International Classification:
G06F 1300
G06F 1328
G06F 1328
US Classification:
395281
Abstract:
The present invention is useful in a data processing system having a data processor coupled to a SCSI channel disposed for transmitting and receiving data between the data processor and a peripheral storage subsystem. The present invention is a method for controlling a bridge controller that permits expanding the maximum allowable number of disk drives connectable to the SCSI channel. In particular the method comprises the steps of receiving a command from the SCSI channel; initializing queue pointers from a memory in response to the command; determining the command type and setting flags and pointers in response thereto; when the command is a write operation, transferring data from the SCSI channel and storing the data in the memory; selecting a disk drive to receive the data by sending message and command bytes to the disk drive; and, transferring the data from the memory to the selected disk drive. The method of the present invention also includes the steps of transferring data from the disk drive and storing the data in the memory when the command is a read command, selecting a SCSI channel to receive data by sending message bytes to the SCSI channel, and transferring the data from the memory to the selected SCSI channel.