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:
Jul. 08, 2025
Filed:
Feb. 23, 2024
Dell Products L.p., Hopkinton, MA (US);
Kuolin Hua, Natick, MA (US);
Kunxiu Gao, Boxborough, MA (US);
Dell Products L.P., Hopkinton, MA (US);
Abstract
A minimal cluster of W+1 drives for RAID width W includes at least 2*W same-size sequentially indexed cells on each drive. More specifically, each drive is organized into W*(LCM of 2, 3, . . . N, N+1) same-size cells, where N is a predetermined number to support even distribution of spares over the first N cluster splits. Spare cells of aggregate capacity equivalent to a single drive are distributed such that there are W spare cells in each W-cell-wide submatrix. In the first cell index of each of the submatrices, a protection group is created in sequentially indexed drives starting with the lowest indexed drive. Also in each submatrix, W spare cells and (W−1) additional protection groups are distributed in cell-index-wise consecutive runs of a spare cell followed by sequentially ordered members of the additional protection groups. Spare capacity is widely distributed by adding drives to the cluster, creating spare cells, splitting the cluster into first and second clusters, and distributing the spare cells across W drives in each of the first and second clusters.