公开(公告)号：US11461023B1

公开(公告)日：2022-10-04

申请号：US15885201

申请日：2018-01-31

Applicant: EMC IP Holding Company LLC

Inventor： Jun Li ,  James M. Guyer ,  Stephen R. Ives

IPC: G06F3/06 ,  G06F11/10

Abstract: Flexibly expanding the storage capacity of a data storage system by adding a single physical storage device or any number of disk drives to an existing storage system without the need to reconfigure existing erasure encoding groups of the system. The physical storage devices of a data storage system may be divided into a plurality of slices, and each slice may be a member of an erasure encoding group. Physical storage devices that are added to the data storage system may be divided into same number of slices and/to slices of a same size, which then may be added to existing erasure encoding groups, utilized as spare slices or left idle until all of the slices are integrated into the data storage system.

公开(公告)号：US20190317682A1

公开(公告)日：2019-10-17

申请号：US15950805

申请日：2018-04-11

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Jun Li ,  Adnan Sahin ,  James M. Guyer ,  Stephen R. Ives

IPC: G06F3/06 ,  G06F12/02 ,  G06F11/30 ,  G06F11/34

Abstract: The system, devices, and methods disclosed herein relate to using historic data storage system utilization metrics to automate data expansion capacity. In some embodiments, the data storage system is a RAID cloud having a plurality of storage devices divided into logical slices, also called splits. Methods disclosed herein allow user defined thresholds to be set wherein the thresholds control when data storage will be expanded. Data storage expansion capacity can be based upon historic usage criteria or customer-based criteria. Additional system customizations include user control over rebalancing data distribution as well as determining when system performance should be routinely evaluated offline.

公开(公告)号：US10719398B1

公开(公告)日：2020-07-21

申请号：US15653341

申请日：2017-07-18

Applicant: EMC IP HOLDING COMPANY LLC

Inventor： Jun Li ,  James Marriot Guyer ,  Michael D Garvey ,  Stephen Richard Ives

IPC: G06F11/00 ,  G06F11/10 ,  G06F3/06 ,  G11C29/52

Abstract: Each SSD in an array is divided into splits that are contiguous LBA ranges of equal capacity. The splits are managed as if they were sub-drives or logical drives and used in RAID groups or other forms of redundancy schemes. A processor external to the SSD collects pending defect data log from the SSDs and determines which splits are associated with reported defects. Failed splits are rebuilt in spare splits using RAID or another redundancy scheme. Repaired splits are returned to service as spare splits. Irreparable splits are marked as lost. In the case of SSD failure the data splits of the SSD are rebuilt to a spare SSD. If enough failed splits of the failed SSD can be repaired then the repaired SSD may be returned to service.