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:
Mar. 09, 2021
Filed:
Jul. 31, 2018
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Stephen Richard Ives, West Boylston, MA (US);
Ningdong Li, Acton, MA (US);
Seema G. Pai, Shrewsbury, MA (US);
Daniel J. Rodrigues, North Attleboro, MA (US);
Scott Rowlands, Marietta, GA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Techniques for processing I/O operations may include performing DMA (direct memory access) operations between a data storage system, one or more physical storage devices, and a hardware component that communicate over at least one bus using a DMA-based protocol, such as NVMe (Non-Volatile Memory Express). The hardware device may perform encryption and decryption processing of data that is, respectively, stored to, and read from, physical non-volatile storage. The hardware device may optionally perform other processing for other data-related operations such as any of data validation and integrity checking, data deduplication, data compression, and data decompression. When performing DMA transfers, multiple descriptors, such as SGLs (scatter gather lists) or PRPs (physical region pages), for multiple data portions having logically contiguous consecutive logical addresses may be combined into a single descriptor sent in a single DMA operation.