The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 1997
Filed:
Oct. 27, 1994
Takemi Kimura, Kawasaki, JP;
Masahiro Hatta, Kawasaki, JP;
Hiroyuki Egawa, Kawasaki, JP;
Akira Takakusagi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An I/O interface control method and data processing equipment each of which can avoid data destruction in an I/O unit even when a channel control unit is in a check/stop state. When an abnormal state notification signal from the channel control unit has been received, the channel element completes an I/O operation in execution to halt a transmission to a new I/O operation. When the abnormal state notification signal delayed by a predetermined time has been received, the main storage control unit separates the channel control unit from the channel element to halt the data transmission. The present invention can be applicable to computer systems each including a DASD acting as an I/O unit.