Memory system with multiple striping of raid groups and method for performing the same
AssigneeInnovations In Memory LLC
InventorJon C. R. Bennett
Life of this patent
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Abstract
A data memory system is described, where there may be an asymmetry in the time needed to write or erase data and the time needed to read data. The data may be stored using a RAID data storage arrangement and the reading, writing and erasing operations on the modules arranged such that the erasing and writing operations may be performed without significant latency for performing a read operation. Where a failure of a memory module in the memory system occurs, methods for recovering the data of the failed module are disclosed which may selected in accordance with policies that may relate to the minimizing the possibility of irretrievable data loss, or degradation of latency performance.
Claims20
A memory system, comprising:
- a processor in communication with a plurality of memory modules, wherein the plurality of memory modules belong to a group of memory modules;
- the processor is configured to receive a data request;
- and
- on a condition that an erase operation prevents a read data operation, the read data operation in response to the received data request, from being performed on a memory module of the group of memory modules where the requested data is stored, the processor is configured to read sufficient previously stored data and redundancy data for the previously stored data from memory modules of the group of memory modules to provide the requested data, with a time delay of less than a time period required to perform an erase operation by the memory module.
A method of storing data in a memory system, the method comprising:
- receiving, by a processor, a request for stored data:
- on a condition that an erase operation or a write data operation prevents a read data operation, the read data operation in response to the request for stored data, on one or more memory modules of a group of memory modules where the requested data is stored, reading sufficient stored data and redundancy data from other memory modules of the group of memory modules and reconstructing the requested stored data.
A memory system, comprising:
- a processor in communication with a plurality of memory modules, wherein the plurality of memory modules belong to a group of memory modules;
- the processor is configured to receive a data request;
- and
- on a condition that a write data operation prevents a read data operation, the read data operation in response to the received data request, from being performed on a memory module of the group of memory modules where the requested data is stored, the processor is configured to read sufficient previously stored data and redundancy data for the previously stored data from memory modules of the group of memory modules to provide the requested data, with a time delay of less than a time period required to perform a write data operation by the memory module.
Dependencies are inferred from the claim text.