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:
Jun. 03, 2025
Filed:
Nov. 30, 2023
Dell Products L.p., Hopkinton, MA (US);
Peter Callewaert, Eernegem, BE;
Dennis Trulli, Jr., Hudson, MA (US);
Brett Quinn, Cotuit, MA (US);
John Darling, McKinney, TX (US);
Dell Products L.P., Hopkinton, MA (US);
Abstract
RDF/QAR bandwidth reduction is a GDDR feature that allows for separate synchronous-only RDF groups from sites DC1→DC2 to be included in the QAR consistency group definition without RDF/A protection. The devices in these sync-only RDF groups form perfect quadruplets like regular QAR devices, but the RDF groups from sites DC1→DC3 and DC2→DC4 are not included in QAR-A and QAR-B Multi Session Consistency group definitions. Instead, these sync-only pairing RDF groups are replicated to the secondary region using ADCOPY-DISK mode or not replicating at all (suspended). The sync-only devices have no QAR recovery capability from sites DC3→DC4, but device pairing from DC3→DC4 is present via sync-only RDF groups.