Error correction for storage devices
First Claim
1. A method comprising:
- receiving, at a storage controller, a data request for a storage device;
reading, in response to the data request, data from discrete units of storage in the storage device, the data comprising stored data read from two or more of the discrete units of storage and parity data read from at least one of the discrete units of storage;
detecting an error in the stored data from the reading; and
recovering stored data for at least one of the discrete units of storage using the parity data and the stored data read from one or more remaining ones of the two or more of the discrete units of storage.
4 Assignments
0 Petitions
Accused Products
Abstract
Systems and techniques relating to fault tolerant data storage in storage devices, such as storage devices that employ Shingled Magnetic Recording (SMR) and/or storage devices that employ solid state memory, include a method, in some implementations, including: receiving, at a storage controller, a data request for a storage device; reading, in response to the data request, data from discrete units of storage in the storage device, the data comprising stored data read from two or more of the discrete units of storage and parity data read from at least one of the discrete units of storage; detecting an error in the stored data from the reading; and recovering stored data for at least one of the discrete units of storage using the parity data and the stored data read from one or more remaining ones of the two or more of the discrete units of storage.
50 Citations
22 Claims
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1. A method comprising:
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receiving, at a storage controller, a data request for a storage device; reading, in response to the data request, data from discrete units of storage in the storage device, the data comprising stored data read from two or more of the discrete units of storage and parity data read from at least one of the discrete units of storage; detecting an error in the stored data from the reading; and recovering stored data for at least one of the discrete units of storage using the parity data and the stored data read from one or more remaining ones of the two or more of the discrete units of storage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A storage system comprising:
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discrete units of storage in a storage device; and a controller configured to receive a data request for the storage device, read data from the discrete units of storage in the storage device responsive to the data request, including stored data read from two or more of the discrete units of storage and parity data read from at least one of the discrete units of storage, and recover stored data for at least one of the discrete units of storage using the parity data and the stored data read from one or more remaining ones of the two or more of the discrete units of storage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification