摘要:
In a redundant array of disks, the disks are divided into areas of different sizes, so that small amounts of data can be stored in an area of an appropriate size on a single disk, instead of being spread over multiple disks. A usage status table indicates which areas are in use. Check information is generated and stored only for areas indicated to be in use. When new check information is generated, it is therefore possible to omit the reading of unnecessary old data and old check information. When a disk fails and is replaced with a standby disk, only the data in areas indicated to be in use are reconstructed. Check information can be stored on a solid-state disk.
摘要:
In a redundant array of disks, the disks are divided into areas of different sizes, so that small amounts of data can be stored in an area of an appropriate size on a single disk, instead of being spread over multiple disks. A usage status table indicates which areas are in use. Check information is generated and stored only for areas indicated to be in use. When new check information is generated, it is therefore possible to omit the reading of unnecessary old data and old check information. When a disk fails and is replaced with a standby disk, only the data in areas indicated to be in use are reconstructed. Check information can be stored on a solid-state disk.
摘要:
In a redundant array of disks, the disks are divided into areas of different sizes, so that small amounts of data can be stored in an area of an appropriate size on a single disk, instead of being spread over multiple disks. A usage status table indicates which areas are in use. Check information is generated and stored only for areas indicated to be in use. When new check information is generated, it is therefore possible to omit the reading of unnecessary old data and old check information.
摘要:
A disk unit including a control unit for controlling the stop position of a positioning electric motor and positioning a magnetic head operatively linked with the positioning electric motor on a predetermined one of data tracks on a magnetic disk, and positioning error adjustment unit for supplying analog signals to the control unit, wherein the analog signals are related to the positioning error detected by the magnetic head. The control unit includes a control circuit for causing an exciting current which goes high during a time interval T1 and goes low during a time interval T2 during a period T to flow in a first exciting coil of the motor and for causing exciting current which goes low during the same time interval T1 and goes high during the same time interval T2 to flow in another exciting coil adjacent to the first coil, as a function of the magnitude of the aforementioned analog signal; the duration of the time intervals T1 and T2 with respect to the period T is adjusted by the control unit.
摘要:
A semiconductor storage system comprises a semiconductor storage element array including a plurality of semiconductor memory elements, a data bus for transferring data to said semiconductor storage element array, an address bus for inputting an address to said semiconductor storage element array, a read/write controller for controlling read/write of the data written to said semiconductor storage element array, an interface control module for controlling a transfer/receipt of data and commands to and from an outside system, a microprocessor for controlling said read/write controller and said interface control module, a defect address memory for storing and outputting information on an address where at least one defective bit exists and an alternate address to be substituted for said address, and a defect address manipulating circuit for substituting said alternate address for said address where said defective bit exists in accordance with an output of said defect address memory.
摘要:
A content processing apparatus managed as a content-using apparatus in apparatus information associating a content-using apparatus that supports content data with functions available in using the content data, and having a content processing unit that processes content data in response to a user's operation so that the user can utilize the content data, a used function identification unit that identifies a function used to process the content data and generates used function information indicating the identified function, and an apparatus search result display unit to display information of a content-using apparatus extracted by searching through apparatus information based on the used function information.
摘要:
An image processing apparatus is connected to an external device and includes a first receiving unit that receives information indicating a first volume of unprinted print data out of print data capable of being subject to distributed printing from the external device; a deciding unit that decides a second volume of the unprinted print data to undertake in the image processing apparatus for distributed printing on the basis of a predetermined condition upon reception of the information indicating the first volume of the unprinted print data; a first transmitting unit that transmits information indicating the second volume to the external device; and a second receiving unit that receives a piece of the unprinted print data corresponding to the second volume from the external device.
摘要:
An electronic apparatus for performing an operation by use of an application, which can communicate with a plurality of external apparatuses, includes an application registering unit to register one or more applications selected as available applications from applications installed in the plurality of external apparatuses, an application selecting unit to select an application to be utilized from the one or more applications registered by the application registering unit, and a control unit to communicate with an external apparatus having the selected application installed therein to perform the operation by utilizing the selected application installed in the external apparatus.
摘要:
A prescaler that operates in a broad band. The prescaler includes a buffer and a counter. The buffer includes a first amplification circuit, which has three inverter circuits of different drive capacities, a second amplification circuit, which has four series-connected inverter circuits, and a feedback circuit. One of the inverter circuits is connected between a capacitor and an inverter circuit via a first switch circuit and a second switch circuit. This varies the drive capacity of the first amplification circuit. The feedback circuit functions as a variable resistor having two transistors.
摘要:
A power saving operation control method and device for a phase comparator unit are provided. The control device includes: a reference signal frequency dividing unit which divides the frequency of a reference signal to generate a reference frequency divided signal; a comparison signal frequency unit which divides an input signal to generate a comparison frequency divided signal; a phase comparator which compares the phases of the reference frequency divided signal and the comparison frequency divided signal; a canceling signal generator which generates a power saving state canceling signal in accordance with the reference frequency divided signal and the comparison frequency divided signal; a first initializing signal generator which generates a first initializing signal for initializing the reference signal frequency dividing unit in accordance with the power saving state canceling signal; and a second initializing signal generator which generates a second initializing signal for initializing the comparison signal frequency dividing unit in accordance with the power saving state canceling signal.