Invention Grant
US08825950B2 Redundant array of inexpensive disks (RAID) system configured to reduce rebuild time and to prevent data sprawl
有权
冗余的廉价磁盘阵列（RAID）系统配置为减少重建时间并防止数据蔓延
- Patent Title: Redundant array of inexpensive disks (RAID) system configured to reduce rebuild time and to prevent data sprawl
- Patent Title (中): 冗余的廉价磁盘阵列（RAID）系统配置为减少重建时间并防止数据蔓延
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Application No.: US13037895Application Date: 2011-03-01
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Publication No.: US08825950B2Publication Date: 2014-09-02
- Inventor: Luca Bert
- Applicant: Luca Bert
- Applicant Address: US CA Milpitas
- Assignee: LSI Corporation
- Current Assignee: LSI Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Smith Risley Tempel Santos LLC
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/06 ; G06F12/02
Abstract:
A RAID system is provided in which, in the event that a rebuild is to be performed for one of the PDs, a filter driver of the operating system of the computer of the RAID system informs the RAID controller of the RAID system of addresses in the virtual memory that are unused. Unused virtual memory addresses are those which have never been written by the OS as well as those which have been written by the OS and subsequently freed by the OS. The RAID controller translates the unused virtual memory addresses into unused physical addresses. The RAID controller then reconstructs data and parity only for the unused physical addresses in the PD for which the rebuild is being performed. This reduces the amount of data and parity that are rebuilt during a rebuild process and reduces the amount of time that is required to perform the rebuild process. In addition, the RAID system is capable of being configured to prevent or reduce data sprawl.
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