APPARATUS, SYSTEM, AND METHOD FOR WEAR MANAGEMENT
First Claim
1. A method, comprising:
- determining an overall reliability metric of a solid-state storage medium based on reliability metrics of a plurality of different sections of the solid-state storage medium;
identifying a section of the solid-state storage medium having a reliability metric that differs from the overall reliability metric by more than a threshold; and
managing storage operations performed on the solid-state storage medium to adjust wear of the identified section in response to the storage operations.
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Accused Products
Abstract
A storage module is configured to determine a health metric of a storage division of a solid-state storage medium. The health metric may comprise a combination of factors, including, but not limited to: wear level, performance (e.g., program time, erase time, and the like), error rate, and the like. A wear level module may configure storage operations to reduce the wear rate of storage divisions having poor health metrics and/or heath metrics that are degrading more quickly than other storage divisions. Reducing wear rate may include deferring grooming operations, delaying use for storage operations, temporarily retiring the storage division, or the like. Storage divisions may be brought back into service at normal use rates in response determining that other portions of the storage media have been worn to the point that they exhibit similar health and/or reliability characteristics.
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Citations
21 Claims
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1. A method, comprising:
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determining an overall reliability metric of a solid-state storage medium based on reliability metrics of a plurality of different sections of the solid-state storage medium; identifying a section of the solid-state storage medium having a reliability metric that differs from the overall reliability metric by more than a threshold; and managing storage operations performed on the solid-state storage medium to adjust wear of the identified section in response to the storage operations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus, comprising:
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a reliability analysis module configured to determine an aggregate health metric corresponding to respective health metrics of storage divisions of a solid-state storage medium and to identify a set of one or more storage divisions having health metrics that deviate from the aggregate health metric by more than a threshold; and a wear management module configured to adapt storage operations performed on the identified set of storage divisions to manage usage of the identified set of storage divisions. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A system, comprising:
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means for identifying a first set of a plurality of solid-state storage sections having reliability characteristics that differ from reliability characteristics of a second set of the plurality of solid-state storage sections by more than a threshold; means for receiving a plurality of requests to perform storage operations on the solid-state storage sections; and means for modifying a sequential storage pattern for the requested storage operations to vary usage of the first set of solid-state storage sections as compared to usage of the second set of solid-state storage sections. - View Dependent Claims (18, 19, 20, 21)
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Specification