Dual-drive fault tolerant method and system for assigning data chunks to column parity sets
US6453428B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1999 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Jul 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and system for assigning data chunks to column parity sets in a dual-drive fault tolerant storage disk drive system having N disk drives, where N is a prime number. Each of the N disk drives are organized into N chunks such that the N disk drives are configured as one or more N×N array of chunks. The array has chunks arranged in N rows from row 1 to row N and in N columns from column 1 to column N. Each row includes a plurality of data chunks for storing data, a column parity chunk for storing a column parity set, and a row parity chunk for storing a row parity set. These data chunks are assigned in a predetermined order. The data chunks in each row are assigned to the row parity set. Each column parity set is associated with a set of data chunks in the array, wherein row m is associated with column parity set Qm where m is an integer that ranges from 1 to N. For row 1 of a selected N×N array, a first data chunk is assigned to a column parity set Qi wherein i is an integer determined by rounding down (N/2). For each of the remaining data chunks in row 1, each data chunk is assigned to a column parity set Qj, wherein j is an intege…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.