摘要:
A memory system including a nonvolatile semiconductor storage device includes: a nonvolatile memory unit that includes a first data area in which data is frequently rewritten and a second data area in which data is hardly rewritten; and a control unit. The control unit sequentially selects logical block addresses in the second data area in which data is hardly rewritten and updates physical block addresses at new rewriting destinations in the first data area in which data is frequently rewritten to physical block addresses corresponding to the logical block addresses selected.
摘要:
A nonvolatile semiconductor storage device and method of managing the same are provided. The nonvolatile semiconductor storage device includes a nonvolatile memory configured to be electrically rewritable; and a controller configured to control an access area of the nonvolatile memory on the basis of information associated with management of the nonvolatile memory. The controller partitions an area of the nonvolatile memory for management and numbers management information for managing data for each area and a map of the management information in an integrated manner to write the numbered management information and map to the nonvolatile memory, thereby determining whether the management information and the map are normal on the basis of the numbering.
摘要:
A nonvolatile semiconductor storage device and method of managing the same are provided. The nonvolatile semiconductor storage device includes a nonvolatile memory configured to be electrically rewritable; and a controller configured to control an access area of the nonvolatile memory on the basis of information associated with management of the nonvolatile memory. The controller partitions an area of the nonvolatile memory for management and numbers management information for managing data for each area and a map of the management information in an integrated manner to write the numbered management information and map to the nonvolatile memory, thereby determining whether the management information and the map are normal on the basis of the numbering.
摘要:
A memory system including a nonvolatile semiconductor storage device includes: a nonvolatile memory unit that includes a first data area in which data is frequently rewritten and a second data area in which data is hardly rewritten; and a control unit. The control unit sequentially selects logical block addresses in the second data area in which data is hardly rewritten and updates physical block addresses at new rewriting destinations in the first data area in which data is frequently rewritten to physical block addresses corresponding to the logical block addresses selected.
摘要:
A nonvolatile memory system includes a nonvolatile memory and a controller. The controller is configured to manage the nonvolatile memory based on management information. The management information of the controller includes a basic table for collectively managing a plurality of blocks and differential information between the blocks. The controller is operable to manage the blocks collectively with the basic table and manage different portions of the blocks within the collected range using the differential information.
摘要:
A nonvolatile memory system includes a nonvolatile memory and a controller. The controller is configured to manage the nonvolatile memory based on management information. The management information of the controller includes a basic table for collectively managing a plurality of blocks and differential information between the blocks. The controller is operable to manage the blocks collectively with the basic table and manage different portions of the blocks within the collected range using the differential information.
摘要:
A device for reading data recorded on a recording medium having multiple tracks, the device including: a receiver that receives designations of a number of data elements to be read; and a determination unit that determines an order of reading the data elements so that, no matter on which track of the tracks each of the data elements is recorded, the data elements are read in an order of recorded locations of the data elements in a direction along the tracks on which the data elements are recorded.
摘要:
A nonvolatile semiconductor memory apparatus is disclosed which includes: a nonvolatile memory configured to be electrically rewritable; and a controller configured to control access to the nonvolatile memory based on information about access to the nonvolatile memory; wherein the controller selects one of a plurality of trade-offs between access reliability and performance and carries out access control in accordance with the selected trade-off.
摘要:
An external storage device is part of a ring-like first route formed by connecting multiple external storage devices to each other via communication channels. The external storage device comprises a first connection unit having a first input port and a first output port, and a second connection unit having a second output port and a second input port that are connected to a first input port and a first output port of an adjacent external storage device on the first route, respectively, to form one communication channel of the first route. When both connection units are enabled, information received by the first input port and the second input port is sent from the second output port and the first output port, respectively. When one of the connection units is disabled, information received by the input port of an enabled connection unit is sent from the output port of the enabled connection unit. If a communication failure has been detected in one communication channel of the first route, connections to the first spare communication channel are enabled, and connections to the failure-detected communication channel are disabled.
摘要:
A computer system, which shifts a mode to a power saving mode when there is no user input at a keyboard for a predetermined time period, employs a circuit for detecting writing to a video memory, and a power management program for managing power in corporation with the circuit. When the writing to a video memory is performed, a shift to the power saving mode is inhibited, even though there is no input at the keyboard during the predetermined time period.