Method and apparatus for automatic solid state drive performance recovery
AssigneeLenovo (Singapore) Pte. Ltd.
InventorsDonald R. Frame, Jeffrey R. Hobbet, Michael Scott Mettler, Kenneth Dean Timmons
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Abstract
A method and apparatus are disclosed for automatic solid state drive performance recovery. A detection module detects a first SSD exceeding a fragmentation threshold. A plurality of drives comprises the first SSD and stores a data copy of data stored on the first SSD. An erase module erases a mapping table for the first SSD. The mapping table maps Logical Block Addresses LBA to physical addresses for the first SSD. A rebuild module rebuilds the data and the mapping table on the first SSD from the data copy.
Claims20
A computer readable storage medium storing a computer readable program on a tangible storage device, wherein the computer readable program when executed on a computer causes the computer to recover performance by:
- detecting a first solid state drive (SSD) exceeding a fragmentation threshold, wherein a plurality of drives comprises the first SSD and stores a data copy of data stored on the first SSD;
- erasing a mapping table for the first SSD in response to detecting the first SSD exceeding the fragmentation threshold, the mapping table mapping logical block addresses (LBA) to physical addresses for the first SSD, so that no physical addresses are identified for each LBA;
- and
- rebuilding the data and the mapping table on the first SSD from the data copy.
An apparatus comprising:
- a detection module detecting a first SSD exceeding a fragmentation threshold, wherein a plurality of drives comprises the first SSD and stores a data copy of data stored on the first SSD;
- an erase module erasing a mapping table for the first SSD in response to detecting the first SSD exceeding the fragmentation threshold, the mapping table mapping LBA to physical addresses for the first SSD, so that no physical addresses are identified for each LBA;
- and
- a rebuild module rebuilding the data and the mapping table on the first SSD from the data copy.
A method comprising:
- detecting a first SSD exceeding a fragmentation threshold, wherein a plurality of drives comprises the first SSD and stores a data copy of data stored on the first SSD;
- erasing a mapping table for the first SSD in response to detecting the first SSD exceeding the fragmentation threshold, the mapping table mapping LBA to physical addresses for the first SSD, so that no physical addresses are identified for each LBA;
- and
- rebuilding the data and the mapping table on the first SSD from the data copy.
Dependencies are inferred from the claim text.