318 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.

If a disk array device according to the invention initially has four disk devices, which is the smallest number of disk devices for RAID5 (3D+P), the storage region of each of the four disk devices is equally divided by four to produce partitions. Then, four partitions are selected respectively from the four disk devices and combined to form a redundancy group so that a total of four redundancy groups are formed. When another disk device is added, its storage region is also equally divided by four. Four partitions are selected from the four redundancy groups, one from each of the disk devices, and the data of the selected four partitions are copied to the four partitions of the added disk device. After the completion of the copying, the origin of copying partitions are excluded from the original redundancy groups and the corresponding four destination of copying partitions are incorporated to replace the excluded partitions. The four origin of copying partitions excluded from the original redundancy groups are combined to generate a new redundancy group.

Data Protection on computer data is to insure data availability. The mission critical data has been chronically stored and labeled with version, distinguished in time of stored. In order to save storage of a backup medium, one full backup is stored and then is followed by many differential or incremental backups. The disclosed employs a Direct Access Storage Device (DASD or disk) as a backup medium. Disk provides a memory model with (1) random access attribute and (2) flat address space. Therefore data restoration for a given version can be achieved by an intelligent backup disk device rather than by a backup server. Intelligent backup disk device compares backup data between different versions and eliminates redundant backup data in later version. Presently backup server performs all data protection functions that include data backup and data restoration. An intelligent primary disk device, where the primary data resides, is capable to record all write operations on a write journal continuously between the previous backup and the ensuing backup. Once a backup is requested, the primary intelligent disk device retrieves write data from its disk medium and transfers the write data along with the write journal to the intelligent backup disk device where the second copy is stored. The intelligent primary disk device and the intelligent backup disk device concertedly perform data protection functions. Furthermore, these data protection functions can be located at a SAN (Storage Area network) switch. The switch becomes the center of data protection in networked computer configuration.

To obtain a volume image of a given generation. A storage system of this invention includes a disk device in which an original volume is provided to read / write data from a host, a copy volume is provided to store a copy of the original volume of a predetermined timing, and a snapshot volume is provided to store snapshot data of a snapshot of the original volume; and a storage control unit which includes a management unit for controlling the storage control unit, a channel I / F connected to the host, and a device I / F connected to the disk device, in which the management unit copies data of the original volume to the copy volume at a predetermined timing, stores the snapshot data of the snapshot in the snapshot volume corresponding to a write request in the original volume, manages a generation of the created snapshot and a generation of the copy volume, and reads data from at least one of the snapshot volume and the copy volume when a read request from a volume of a generation different from that of the original volume is received from the host.

Under a hetero-environment in which different sorts of disk-systems are mixed with each other, a data guaranteeing operation can be carried out. When a cache controller of a local disk system receives a data writing request from a host computer the cache controller stores data into a local disk provided in a disk device group. The data received from the host computer is also transmitted to a remote disk system, and is stored in a remote disk. The data stored in the remote disk is immediately read and the data written in the remote disk is compared with the data written in the local disk. As a result, since a data guarantee operation on the remote side is processed by the local disk system instead of the remote disk system, a data guaranteeing operation when a remote copying operation is performed can be carried out even in the storage system under a hetero-environment.

This invention belongs to the SAN technology field of storage area network, the character is: it organizes the frontal server in SAN and excrescent DRAM memory resources in the object node server together to form a high speed virtual hardware TH-SSD, and gives users the same read-write connect of normal disk. This method uses virtual technology to project the primary dispersive memory resources to a continuous virtual disk address spaces, all the data requests to TH-SSD from front are the request to virtual disk. Factually, it expends the usable virtual disk spaces because of using expending memory technology of X86 platform; and it ensures date integrality in TH-SSD because of using the image strategy with double log and double copy; and it realizes the no gap supporting to FC SAN and IP SAN, and makes TH-SSD can good work not only in fiber-optic network, but also in Ethernet.

The invention discloses an automatic assembly method of a tactile switch, and the method comprises the following steps: preparing a rotating disk device on a machine table, and arranging a plurality of positioning clamps on the rotating disk device at intervals; sequentially arranging a cover plate conveying device, a button conveying device, a base conveying device, a riveting device, an insulating resistance detecting device, a good product blanking device and a defective product blanking device on the periphery of the rotating disk device; conveying a cover plate into the positioning clamp on the rotating disk device through the cover plate conveying device for positioning; conveying a button into the positioning clamp through the button conveying device for positioning; conveying a base into the positioning clamp through the base conveying device for positioning, arranging the base into the cover plate and pre-riveting rivet pins on the cover plate; enabling the riveting device to work, completing the compression of the rivet pins on the cover plate, completely fixing the base and the cover plate, and completing the assembly process of the tactile switch; and using the insulating resistance detecting device to detect whether the tactile switch has the connection phenomenon or not by applying a 500V voltage.

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.

A first recording layer for recording information of an optical disk and a second recording layer of the optical disk on which a visible image can be recorded are disposed at an interval of 0.5 mm or more. Thus, even when a high power laser is used on one of the layers, data on the other layer will not be destroyed.

A Redundant Array of Independent Disks (RAID) level migration method for performing an online RAID level migration and adding a disk to a destination RAID is provided. First, the required information for migration is specified, and then a degraded mode is used to establish the destination RAID, and file system is built on the destination RAID. The file system of the source disk device is configured to be read-only, and all data of the source disk device are duplicated to the destination RAID. After completing file duplication, the destination RAID replaces the source disk device. The operation of the source disk device is stopped and the source disk device is added to the destination RAID. As a result, the RAID migration is accomplished. In addition, an associated RAID level migration system is further provided.

A random seed scramble for preventing the deterioration of a medium is applied to the next generation optical disk. A seed is stored to a BIS area. ID or an EDC is checked to hold interchangeability before and after scramble release. When no error is generated in data before the scramble release, it is recognized as an unscrambled disk. In contrast to this, when no error is generated in data after the scramble release, it is recognized as a scrambled disk. An information storing area showing an area to be rewritten by performing the scramble and an area to be rewritten without performing the scramble is arranged.

The invention discloses a failing disk detection and restoration method and a failing disk detection and restoration device. The method comprises the following steps: analyzing one or more failing disk equipment names according to system logs; locating and labeling each failing disk according to an analyzed failing disk equipment name and respectively detecting failure of each failing disk; and restoring each failing disk according to a failure detection result of each failing disk. According to the scheme, disk failure can be monitored in a real-time manner. Failing disks are located and automatically restored in a fast manner. Therefore, working efficiency is increased. The scheme supports a plurality of different server and storage businesses so that compatibility is raised.

A computer system can always execute processing under the same environments not depending on the terminal device that is directly used by the user, no matter where the client used by the user is, and no matter what device is used. In the computer system, one of plural computer PCBAs that do not install a hard disk device therein is selected from the terminal device, remotely controllable environments are constituted, and data is read and written from the hard disk device which are coupled to all of the computer PCBAs over a network that is used by the user.

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 disc device comprising a transfer unit operable to provide a transferring force to a disc inserted from the outside to transfer the disc into a storage area in the device, a sensor unit for detecting the position of the inserted disc, and a control unit for controlling a operational speed of the transfer unit. The control unit controls the operational speed of the transfer unit in the disc loading direction at a low-speed until the disc inserted from the outside reaches the transfer unit. The control unit then adjusts the operational speed of the transfer unit in the disc loading direction from a low-speed to a high-speed when the sensor unit detects that the disc is inserted into the position in which a transferring force from the transfer unit is given to the disc, or after a predetermined period of time has elapsed. Accordingly, the disc device reduces operation noise and resistance when the disc is inserted.

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.

An optical disk device capable of increasing access speed and an image pickup device having such an optical disk device. In a region at the inside of an optical disk where the rotational speed of the spindle motor reaches its limit, a CAV mode is used for access, while in a region at the outside of the optical disk where a frequency band of an RF signal processor reaches its limit, a CLV mode is used for access. High-speed access to a maximum extent in a range of performance limits of the spindle motor and the RF signal processor is achieved.

The present invention provides an optical disk device which optimizes recording power level used when recording data. A controller records test data in a test region of an optical disk and evaluates reproduced signal quality of the test data, so as to determine an optimum recording power level Po (OPC). Subsequently, the controller uses reflected light intensity level B obtained when recording data to make adjustments to the optimum recording power level Po, thereby obtaining recording power level P. The recording power level P is adjusted such that Bm / Pn=constant, where m and n are positive rational numbers satisfying m<n. When m=1, the value of n is greater than or equal to 1.5 and no larger than 10.

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.

An emulation mitigation module is configured to mitigate emulation of legacy write requests on advanced disk devices using cached data stored in a cache memory of a storage system. A legacy write request may comprise write data blocks formatted in a legacy sector size while an advanced disk device may be formatted in an advanced sector size. The emulation mitigation module may execute a first method for modifying write requests using cached data, a second method for enforcing a minimum requested data size sent to the advanced disk device, and / or a third method for conditionally retrieving data from the advanced disk device and storing to cache. In some embodiments, the second and / or third method may be used with the first method to increase the effectiveness of the first method. The emulation mitigation module may improve performance and / or data integrity for of processing legacy write requests.

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 data storage array apparatus including multiple disks and writing / reading striped data and parity data onto / from the multiple disk devices, each having a storage area divided into multiple blocks, blocks across the multiple disks forming a group, the apparatus made up of: writing / reading means for writing / reading the striped data and the parity data in a group in accordance with an access request from the outside; error information generation means for generating error information indicating the presence / absence of an error caused by a writing operation by the writing / reading means and storing the error information in a memory; judgement means for, at each writing operation, judging whether the error information should be written to a predetermined group; and control means for controlling the writing / reading means to read error information from the memory and write the error information to the predetermined group according to a result obtained from the judgement means.

A magnetic disk device performs magnetic recording by generating a magnetic field using an electric current on a light-irradiated surface of a recording medium. A head unit is formed by laminating an optical film that transmits a light and a metal film through which the electric current flows. A light exposing unit irradiates the light in such a manner that the light is transmitted through the optical film and irradiated on a surface of the recording medium. An electric-current output unit outputs the electric current to the metal film.

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”.