×

Distributed multi-level protection in a raid array based storage system

  • US 9,348,696 B2
  • Filed: 10/01/2010
  • Issued: 05/24/2016
  • Est. Priority Date: 10/01/2010
  • Status: Expired
First Claim
Patent Images

1. A computer system comprising:

  • a data storage subsystem comprising a plurality of storage devices in a redundant array of independent disks (RAID) configuration; and

    a storage controller configured to;

    write a first RAID stripe to the plurality of storage devices including;

    for each storage device of a subset of the plurality of storage devices, writing within a page of the storage device, user data and a checksum that validates the user data stored on the storage device;

    writing within a page of a particular storage device of the plurality storage devices,inter-device protection data, the inter-device protection data protecting the user data stored on each storage device of the subset of the plurality of storage devices;

    intra-page protection data, the intra-page protection data protecting the inter-device protection data stored on the particular storage device; and

    inter-page protection data, the inter-page protection data protecting the checksums stored on each storage device of the subset of storage devices.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×