Host system with direct data file interface configurability
First Claim
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1. A computer system, comprising:
- an internal memory capable of storing data file objects,an interface adapted for connection to a non-volatile memory system thereto that includes a memory cell array organized into blocks of memory cells that store data from data file objects and that are erasable together, anda processor programmed to perform at least the following functions;
read information from the memory system that is externally connected to the interface and that is organized according to an external memory cell block organization structure into physical blocks of memory cells that store data from data file objects about the external memory cell block organization structure,define a continuous logical address space at the interface that includes individual logical blocks of addresses having characteristics corresponding to the external memory cell block organization structure read from memory system connected therewith,assign unique addresses within the blocks of the defined logical address space to data file objects stored in the internal memory, andtransfer the data file objects through the interface with the assigned logical addresses, wherein the processor is further programmed to assign addresses to individual data objects in no more than a preset number of logical blocks that contain addresses of another data file object.
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Abstract
Data files are assigned addresses within one or more logical blocks of a continuous logical address space interface (LBA interface) of a usual type of flash memory system with physical memory cell blocks. This assignment may be done by the host device which typically, but not necessarily, generates the data files. The number of logical blocks containing data of any one file is controlled in a manner that reduces the amount of fragmentation of file data within the physical memory blocks, thereby to maintain good memory performance. The host may configure the logical blocks of the address space in response to learning the physical characteristics of a memory to which it is connected.
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Citations
5 Claims
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1. A computer system, comprising:
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an internal memory capable of storing data file objects, an interface adapted for connection to a non-volatile memory system thereto that includes a memory cell array organized into blocks of memory cells that store data from data file objects and that are erasable together, and a processor programmed to perform at least the following functions; read information from the memory system that is externally connected to the interface and that is organized according to an external memory cell block organization structure into physical blocks of memory cells that store data from data file objects about the external memory cell block organization structure, define a continuous logical address space at the interface that includes individual logical blocks of addresses having characteristics corresponding to the external memory cell block organization structure read from memory system connected therewith, assign unique addresses within the blocks of the defined logical address space to data file objects stored in the internal memory, and transfer the data file objects through the interface with the assigned logical addresses, wherein the processor is further programmed to assign addresses to individual data objects in no more than a preset number of logical blocks that contain addresses of another data file object. - View Dependent Claims (2, 4, 5)
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3. A computer system, comprising:
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an internal memory capable of storing data file objects, an interface adapted for connection to a non-volatile memory system thereto that includes a memory cell array organized into blocks of memory cells that store data from data file objects and that are erasable together, and a processor programmed to perform at least the following functions; read information from the memory system that is externally connected to the interface and that is organized according to an external memory cell block organization structure into physical blocks of memory cells that store data from data file objects about the external memory cell block organization structure, define a continuous logical address space at the interface that includes individual logical blocks of addresses having characteristics corresponding to the external memory cell block organization structure read from memory system connected therewith, assign unique addresses within the blocks of the defined logical address space to data file objects stored in the internal memory, and transfer the data file objects through the interface with the assigned logical addresses, wherein the processor is further programmed to; maintain a first record for the individual logical blocks, maintaining a second record for each of the individual data file objects that are stored in said internal memory of one of a plurality of file states that are based upon how the addresses of the individual stored data file objects are distributed among one or more of a plurality of types of logical blocks, and writing the address of a given one of the data file objects to a type of logical block that is selected based upon the state in the second record of the given file.
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Specification