305 results about "Disks (device)" patented technology

A magnetic recording head includes a main magnetic pole that generates a recording magnetic field in a direction perpendicular to a recording layer, a write shield with a surface that faces a trailing side of the main magnetic pole, so that a write gap is interposed between the surface and the main magnetic pole, the write shield forming a magnetic core together with the main magnetic pole, a recording coil, a high frequency oscillator within the write gap, a wiring through which a current can flow through the main magnetic pole, the high frequency oscillator, and the write shield in series, and a magnetic element made of soft magnetic material, positioned within the write gap and separated from the high frequency oscillator, and configured to form a magnetic path passing through the main magnetic pole, the magnetic element, and the write shield, and not through the high frequency oscillator.

The invention provides a realization method of data encryption in a hard disk, comprising the following steps: monitoring the status of a USB (universal serial bus) Key in real time, performing identity authentication by using an authorized USB Key and obtaining a secret key; storing the protected data in a protected catalog, mapping the space of the protected catalog into a virtual disc when the authorized authentication is successful, encrypting the data written into the disc and deciphering the data read from the disc; using an unprotected catalog as the common disc catalog; and hiding the virtual disc to prevent the access of the protected catalog and the protected data when the authorized USB Key is absent. The data stored in the virtual disc storage area of the protected catalog is encrypted forever, and is automatically decrypted in a memory when being used by a user. The method provided by the invention has the advantages that various discs and various file system can be supported, the traditional data use habit and application program behavior are not changed, and users do not need to purchase new disc devices.

According to one embodiment, a disk device includes a box-shaped case, which contains a disk-shaped recording medium, a drive motor which supports and rotates the recording medium, a head which performs information processing for the recording medium, and a head actuator which moves the head with respect to the recording medium. The disk device has a connection cable pulled out from the case onto an outer surface of the case, a control circuit board provided opposite the outer surface of the case, and a relay flexible printed circuit board which electrically connects the connection cable and the control circuit board.

An optical disk drive of a slot-in type is loadable with any of two optical disks different in the diameter, and has an insertion slot formed in a case chassis for disk loading. A disk entered through the insertion slot is received by a disk support arm set in a ready position. A loading mechanism is actuated when the disk support arm is pressed by the disk. In response to this, plural arms and the disk support arm cooperate to support the disk, which is moved to a chuck position for writing and reading information. For disk unloading, the disk, supported by the. plural arms, is moved by the disk support arm to an ejection position. The disk support arm is shifted from an advance position for pressing the disk to the ejection position, to the ready position which is offset toward the chuck position.

The invention discloses a three-disc type orchard obstacle-avoiding mowing device, which mainly includes a frame, a lifting mechanism, a leveling mechanism, an obstacle-avoiding device, and a cutting device. The frame and the lifting arm are connected through the rotary shaft and the rotary cylinder, the frame and the rotary cylinder are hinged, the hydraulic cylinder I is connected between the two parts, the rotary cylinder is hinged with the lifting arm, the hydraulic cylinder II is connected between the two parts, and the front end of the lifting arm is connected There is a support, the lifting arm is hinged with the support, the hydraulic cylinder III is connected between the two parts, the hydraulic motor is fixed on the upper part of the support, the transmission shaft is connected with the output shaft of the hydraulic motor through a coupling, the cutting disc is connected with the transmission shaft, and the three cutting shafts are The pulley is connected to the transmission shaft, and a cutting knife is installed at the bottom of each cutting shaft, and the distance between the three cutting knives is 120°, and the instantaneous operation track is distributed in three discs. The invention has reasonable design, high working efficiency, can adjust the stubble cutting height, removes weeds between rows of fruit trees, can effectively avoid missed cutting, and has good application prospects.

A recording head of a disk device includes a main magnetic pole, a write shield which faces the main magnetic pole with a write gap interposed therebetween, a coil configured to generate a magnetic field in the main magnetic pole, and a spin torque oscillator which is arranged in the write gap. The spin torque oscillator includes an intermediate layer formed on the main magnetic pole, a field generation layer formed on the intermediate layer, a spin injection layer, and an interface magnetic layer. The field generation layer and the spin injection layer are arranged in parallel to each other in the direction which intersects with the gap length direction of the write gap, and the spin injection layer is electrically connected with the write shield.

When receiving a notification of an error detected by patrol processing of the device adaptor for a secondary disk apparatus, a first recovery processing unit reads out data corresponding to the error location from a normal primary disk apparatus and writes the data into the error disk apparatus to eliminate the error. If it is determined that the content of the error notification is abnormality of the block ID which is an identifier of the order of writing data, a second recovery processing unit retrieves a correct write address indicated by the identifier, compares data of the error disk apparatus with that of the normal disk apparatus, determines that a lost write exists in the case of mismatch, and eliminates the lost write by writing the data read out from the normal disk apparatus into the error disk apparatus.

According to one embodiment, a magnetic disk device having a disk, includes: a flag updating module configured to register a flag used when data is written onto the disk, the data is read from the disk and whether to verify the data or not is determined, so as to be associated with each of a plurality of predetermined temperature sections; a temperature detector configured to detect an environmental temperature of the magnetic disk device; a verifying module configured to determine whether to execute the verification or not according to a flag where the detected environmental temperature corresponds to one temperature section of the plurality of temperature sections and that is registered by the flag updating module so as to be associated with the one temperature section; and a measuring module configured to measure an error rate at a same point in time as the verification.

A method of connecting and operating three or more devices to an IDE bus under the conditions that: (1) no more than two IDE devices may be active at any given time on the same IDE bus, and (2) cable/trace lengths for the IDE bus may not exceed the limits set forth in the IDE bus standard. The IDE devices are configured for cable select connected to the IDE bus, wherein no more than two of the IDE devices are powered on at any given. Further, those IDE devices which are powered on at a give time, have the appropriate logic level asserted on CSEL line so that only one IDE device powered on at any time is a “Master” device, and only one IDE device powered on is a “Slave”.

An optical disk device for reproducing an optical disk having recorded therein a plurality of data to be read at no lower than a specific reading linear speed discretely at a predetermined interval or less, the optical disk device comprises means for determining any one of a minimum value of a disk rotating speed demanded at the current reading position and a minimum value of a disk rotating speed demanded at a second position remote from the current reading position by a predetermined distance, whichever the greater, and target speed setting means for setting the rotating speed greater than the minimum value determined by the determining means as a target rotating speed at the current reading position.

In a magnetic disk device, a magnetic circuit drives an actuator carrying a magnetic head, so that the magnetic head is moved to a target track on a surface of a magnetic disk. A base has a threaded-hole part to which the magnetic circuit is fastened with a screw. A blocking member is provided to enclose a gap which is formed between the magnetic circuit and the threaded-hole part when the magnetic circuit is fastened to the threaded-hole part.