300 results about "File allocation table" patented technology

The present invention relates to a method for performing an image level copy of an information store. The present invention comprises performing a snapshot of an information store that indexes the contents of the information store, retrieving data associated with the contents of the information store from a file allocation table, copying the contents of the information store to a storage device based on the snapshot, and associating the retrieved data with the copied contents to provide file system information for the copied contents.

A flash drive has increased endurance and longevity by reducing writes to flash. An Endurance Translation Layer (ETL) is created in a DRAM buffer and provides temporary storage to reduce flash wear. A Smart Storage Switch (SSS) controller assigns data-type bits when categorizing host accesses as paging files used by memory management, temporary files, File Allocation Table (FAT) and File Descriptor Block (FDB) entries, and user data files, using address ranges and file extensions read from FAT. Paging files and temporary files are never written to flash. Partial-page data is packed and sector mapped by sub-sector mapping tables that are pointed to by a unified mapping table that stores the data-type bits and pointers to data or tables in DRAM. Partial sectors are packed together to reduce DRAM usage and flash wear. A spare / swap area in DRAM reduces flash wear. Reference voltages are adjusted when error correction fails.

This invention relates to one intelligent card memory system and its management method, which comprises memory area and control unit, wherein, the memory area comprises file align list memory area and data memory area of the file content; the said file align list memory area comprises multiple file align list and the memory area comprises multiple data block; each file align list responds to one data block and the control unit finds file align list memory items and processing control according to the relationship.

A memory storage device, a memory controller, and a virus scanning method are provided. In the method, a virus signature database recording a predetermined file segment and a corresponding virus signature is provided. A plurality of logical addresses is mapped to a part of a plurality of physical addresses in a rewritable non-volatile memory chip of the memory storage device, a host system accesses the logical addresses by using a file system including a file allocation table (FAT). At lease one binary code is received. The FAT is analyzed to identify a file segment containing the at least one binary code. If the file segment matches the predetermined file segment, the at least one binary code is not written into the memory storage device or transmitted back to the host system when the at least one binary code matches the virus signature corresponding to the predetermined file segment.

The present in invention is directed to a checkpointing filesystem of a distributed-memory parallel supercomputer comprising a node that accesses user data on the filesystem, the filesystem comprising an interface that is associated with a disk for storing the user data. The checkpointing filesystem provides for taking and checkpoint of the filesystem and rolling back to a previously taken checkpoint, as well as for writing user data to and deleting user data from the checkpointing filesystem. The checkpointing filesystem provides a recently written file allocation table (WFAT) for maintaining information regarding the user data written since a previously taken checkpoint and a recently deleted file allocation table (DFAT) for maintaining information regarding user data deleted from since the previously taken checkpoint, both of which are utilized by the checkpointing filesystem to take a checkpoint of the filesystem and rollback the filesystem to a previously taken checkpoint, as well as to write and delete user data from the checkpointing filesystem.

In a nonvolatile memory system, a host allocates clusters and records allocation information in a File Allocation Table that is stored in the nonvolatile memory. A controller separately allocates certain data and records allocation in a record in a volatile memory. File Allocation Table information provided to the host is modified according to the record in the volatile memory.

The invention discloses a file searching method in a file distribution table system, comprising the steps as follows: A. gaining a cluster number of each file cluster; B. sorting the cluster numbers and building up a cluster number index table; C. searching the cluster number index table, gaining the cluster number of the file cluster to be searched, and gaining the content of the file cluster to be searched by the physical memory address corresponding to the cluster number. The file searching device comprises a CPU and an address index memory unit; the address index memory unit memorizes the cluster number index table which has the cluster number of each cluster of the sorted file; the CPU is used for gaining the cluster number of the file cluster to be searched according to the cluster number index table when the file is being searched and gaining the content of the file cluster to be searched according to the physical memory address corresponding to the cluster number. The invention also discloses a time flow file processor. The invention can improve the file searching speed.