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:
Jan. 26, 2021
Filed:
Jul. 27, 2018
International Business Machines Corporation, Armonk, NY (US);
Raymond Wong, Hopewell Junction, NY (US);
Jie Zheng, Poughkeepsie, NY (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
Technical solutions are described for computing data check word for a host request for an I/O processing operation at a host computer system that communicates with a control unit. An example method includes obtaining information for a first I/O operation at a channel subsystem in the host computer system, and accessing an address control word (ACW) of the first I/O operation. The ACW is stored in the local channel memory, and the ACW includes a first data check seed-value. The method also includes computing a first data check word based on the first data check seed-value from the ACW. The method also includes obtaining information for a second I/O operation at the channel subsystem, and in response to the second i/o operation corresponding to said ACW of the first I/O operation, computing a second data check word based on a second data check seed-value from a cache memory.