公开(公告)号：US20210365384A1

公开(公告)日：2021-11-25

申请号：US15929775

申请日：2020-05-21

Applicant: Seagate Technology LLC

Inventor： Ryan James Goss ,  Daniel John Benjamin ,  David W. Claude ,  Graham David Ferris ,  Ryan Charles Weidemann

IPC: G06F12/1009

Abstract: Apparatus and method for managing metadata in a data storage device such as a solid-state drive (SSD). The metadata are stored in combined (combo) pages in a non-volatile memory (NVM) each having first and second level map entries. The second level map entries provide a logical-to-physical address translation layer for user data blocks stored to the NVM, and the first level map entries describe the second level map entries in the combo page. A global map structure is accessed to identify a selected combo page in the NVM associated with a pending access command. The first and second level map entries are retrieved from the combo page, and the second level map entries are used to identify a target location for the transfer of user data blocks to or from the NVM.

公开(公告)号：US20210279188A1

公开(公告)日：2021-09-09

申请号：US16810357

申请日：2020-03-05

Applicant: Seagate Technology, LLC

Inventor： Ryan James Goss ,  David W. Claude ,  Graham David Ferris ,  Daniel John Benjamin ,  Ryan Charles Weidemann

IPC: G06F13/16 ,  G06F11/30 ,  G06F11/34 ,  G06F12/02

Abstract: Method and apparatus for enhancing performance of a storage device, such as a solid-state drive (SSD). In some embodiments, the storage device monitors a rate at which client I/O access commands are received from a client to transfer data with a non-volatile memory (NVM) of the storage device. A ratio of background access commands to the client I/O access commands is adjusted to maintain completion rates of the client I/O access commands at a predetermined level. The background access commands transfer data internally with the NVM to prepare the storage device to service the client I/O access commands, and can include internal reads and writes to carry out garbage collection and metadata map updates. The ratio may be adjusted by identifying a workload type subjected to the storage device by the client.