Processing unit reclaiming requests in a solid state memory device
AssigneeInternational Business Machines Corporation
InventorsRobert Haas, Roman Pletka
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Abstract
An apparatus and method for processing unit reclaiming requests in a solid state memory device. The present invention provides a method of managing a memory which includes a set of units. The method includes selecting a unit from the set of units having plurality of subunits. The method further includes determining a number of valid subunits m to be relocated from the units selected for a batch operation where m is at least 2. The selecting is carried out by a unit reclaiming process.
Claims19
A method of managing a memory which includes a set of units, the method comprising the steps of:
- selecting a unit from the set of units having plurality of subunits;
- and
- determining a number of valid subunits m to be relocated from the units selected for a batch operation;
- wherein the selecting is carried out by a unit reclaiming process;
- and
- wherein m is at least two.
A memory controller for managing a memory, comprising:
- a processor device configured:
- to select a unit out of a set of units for reclamation by a unit reclaiming process, wherein a unit comprises a set of subunits;
- and
- to determine a number of valid subunits m to be relocated from the selected unit for a batch operation, wherein m is at least two.
A storage device, comprising:
- a memory;
- a memory controller for managing the memory;
- a set of erasable units erasable by a unit reclaiming process to form a free unit;
- wherein the unit comprises a set of subunits, wherein data updates are performed by writing data updates to the subunits so that the updated data is written to a subunit that is different from the subunit that contained the outdated data;
- wherein the subunit that contains the outdated data is an invalid subunit;
- and
- wherein the subunit containing the updated data is a valid subunit.
Dependencies are inferred from the claim text.