Emc IP Holding Company LLC

Emc Corporation

Daniel J Rodrigues

Stephen Richard Ives

Scott Rowlands

Seema G Pai

Ningdong Li

Thomas J DePari

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.

Data encryption and decryption techniques

An input/output section for producing a disable signal at a data transmitter enable/disable terminal of a transceiver in response to the transmit disable enable at the disable signal port of a processor independent of the transmit control signal at the transmit signal port of source of data to be transmitted by the transceiver.

System for controlling optical transceivers

Growing community of inventors

North Attleboro, MA, United States of America

Daniel J Rodrigues