108 results about "Bad sector" patented technology

Systems connected to users generate a plurality of keys which are mutually shared, and download and upload digital contents by using secret channels formed between the systems. An information provider receives an authorization from a certificate authority. A licensed SDMI compliant module (LCM) is authenticated through the information provider, and the information provider and the LCM form a channel. A portable device is authenticated from the information provider through the LCM, and the LCM and the portable device form a channel. The digital content between the LCM and the portable device is downloaded and uploaded according to respective control state data of the LCM and the portable device. The system can use a physical address of a bad sector formed in the portable medium during the manufacturing process for preventing an illegal copy of the downloaded digital contents through the portable device after the digital contents have been downloaded.

A method and system for reducing unauthorized software use include generating a key based on computer-specific information of a computer on which the software is installed and using the key to encrypt an authorization code which enables use of the software on the computer. A representative maintains contact with the software user as a new authorization code from the representative is required after some period of use of the software. The representative encrypts the new password using the key and transfers the encrypted key to authorize use of the software for a next period of use. The encrypted password is a form of digital signature or certificate which is unique to a particular computer and limits use of the software to the particular computer. The key may be generated using various computer-specific information such as the motherboard / processor identification, the number of bad sectors or hard disk identification, and / or the amount of installed memory.

File systems possibly impacted by a bad sector in a disk drive are unmounted. Then the disk drive is scanned in order to identify additional bad sectors, and for each identified bad sector, a logical address of the bad sector is re-vectored to a good sector. An attempt is made to restore the data of each bad sector, and then the file system is checked for consistency. If a bad sector cannot be restored, any application relying on the bad sector is aborted. Once the file system is found to be consistent, the file system is remounted. Re-vectored blocks are reverse mapped to identify damaged or repaired directories and files. Damaged or repaired directories and files are reported to a system administrator, and damaged directories or files of a client are reported to the client.

In a storage device, a bad-sector detecting unit detects a bad sector, and a process determining unit determines whether rescue process is performed for the bad sector. Upon determining to perform the rescue process, the process determining unit controls a damping ratio. A table-updating control unit records various information in an alternating-process control table, and a controller records and reproduces data with respect to a rescue sector based on the alternating-process control table.

A redundant memory circuit for use in an analog semiconductor memory has a cell array divided into sectors. To replace bad sectors, the cell array may include a pair of redundant sectors disposed at opposite ends of the cell array, or may have a centrally located redundant sector. Alternatively, the redundant memory circuit may have a sector selection circuit that selects the sectors and redundant sector in sequence from one end of the cell array to the other, or may have a word line selector located in the center of the cell array, or may have two cell arrays and a redundant sector selection circuit that enables a bad sector in one cell array to be replaced by a redundant sector in either of the two cell arrays. These arrangements improve the capability for redundancy replacement and the quality of the reproduced analog signal.

The invention relates to the field of programmable logic devices and embedded devices, and in particular relates to a hard disk firmware repairing system and a hard disk firmware repairing method. The hard disk firmware repairing system comprises a PCI-E (programmable communication interface-express) interface, a hard disk power supply controller, a hard disk data interface, a principal computer and a central control chip; the PCI-E interface is respectively connected with the central control chip and the principal computer; the input end and the output end of the hard disk power supply controller are respectively connected to the principal computer and a hard disk, and a control end is connected to the central control chip; a control end of the hard disk data interface is connected to the central control chip, and a data transmitting-receiving end is connected to the hard disk. By adopting the hard disk firmware repairing system, the problem that the hard disk cannot be recognized by the principal computer and the breakdown maintenance or data extraction is difficultly carried out due to the damage of the hard disk firmware or the bad track of the hard disk can be solved; through the control of the hard disk firmware repairing system, the data which is not damaged in the hard disk can be recognized and read, so that the hard disk firmware repairing success rate and the data extracting efficiency can be improved.

The invention relates to the technical field of computer storage medium, and discloses a method for monitoring an embedded Linux-based hard disc bad track. A hard disc is divided into a data storage partition, a backup partition and an original data set area; and an original data set in the original data set area is loaded to a memory when a computer is started. The method comprises the following steps: acquiring healthy state data in the hard disc operation process; carrying out data verification on the acquired healthy state data and standard data in the original data set, so as to judge whether the hard disc has a bad track or not; if a bad track occurs, mounting the backup partition, backing up the data in the data storage partition into the backup partition, generating a mirror image document and transmitting a bad track information report. The invention further discloses an embedded Linux-based hard disc bad track monitoring system. By utilizing the method and the system, monitoring, early-warming and repairing of the hard disc bad track under a non-RAID (Redundant Array of Independent Disc) mode are realized; and meanwhile the cost is reduced.

A controller stores therein a sector address set indicating logical storage positions within a nonvolatile-memory storage area; page addresses indicating, in units of pages, physical storage positions within the nonvolatile-memory storage area; and pieces of management information each indicating whether one or more special sectors each being either a bad sector or a trimmed sector trimmed by a TRIM command are present in the corresponding page, while associating them with each other. When an access to a specified sector address is requested, the device refers to the piece of management information and judges whether any special sector is present in the page identified by the page address corresponding to the sector address. The device generates predetermined response data if the page contains one or more special sectors and accesses the nonvolatile-memory storage position corresponding to the sector address if the page contains no special sector.

The invention provides a device for monitoring and repairing a damaged sector of a hard disc. The device comprises a damaged sector managing unit, a disc driving unit, a damaged sector monitoring unit, a universal cache memory unit and a damaged sector replacing unit, wherein a database memory partition for loading a damaged sector database is divided in the hard disc by the damaged sector managing unit when a system is started, a mapping sector is divided from the database memory partition when the judgment of the damaged sector monitoring unit shows that the damaged sector exists in the current sector and writing-in operation is carried out by the universal cache memory unit, and the indexing information of the bad sector and the mapping sector is stored by the damaged sector database; a system file data block in which the sector corresponding to the damaged sector is positioned is marked as a damaged block by the damaged sector replacing unit during reading operation, and the information of the bad sector is duplicated to the mapping sector by the damaged sector replacing unit; when writing-in operation is successfully carried out on the mapping sector by the disc driving unit, the corresponding sector of the damaged sector database is updated by the damaged sector managing unit. The invention further provides a corresponding method. Through the utilization of the device and the method, the technical problem in the prior art that the damaged sector cannot be automatically monitored or the damaged sector cannot be automatically replaced is solved.

The invention provides a method for processing RAID5 bad sector. The method comprises the following steps: transferring a stripe with a bad sector to a reserved region to prevent a small amount of bad sectors of a disk from influencing use of a disk array; and backing up data of a certain disk to a hot spare when the number of bad sectors of the disk reaches an alarm value firstly, thereby enhancing reliability of the disk array.

The invention provides a method for processing bad sectors of an RAID5 disk array. A 4KB bad block recording space is added to a super block of each RAID member disk to record the positions of the bad sectors in all the member disks when the RAID5 disk array is set up. When the RAID5 disk array is started, data of the recording space of bad blocks in each member disk are mapped to a memory, a bad block table is set up in the memory, and the corresponding operation is conducted according to the record of a disc sector in the memory bad block table when the write operation of the disk sector is executed and when errors occur in the process of executing the read operation of the disk sector. According to the method, when the bad sectors appear in the disks, the disks do not need to be removed, only the bad sectors need to be marked, the bad sectors do not need to be read or written, stability of the RAID5 disk array is greatly improved, the service life of the disk array is prolonged, the use ratio of stored resources is improved, and reliability of data is ensured.

The invention provides an automatic restoration method for disk array multi-level data. A first level removes data caused by read-write errors in a bad sector into a reserved area. A second level conducts statistics towards history information of disk damages based on service condition and certain determinants attributes of the reserved area, forecasts whether the disk is out of operation by adopting an intelligent learning method, and backups the data of the disk beforehand which is probably out of operation. Compared with the prior art, the automatic restoration method for the disk array multi-level data can backup the data of the disk which is probably out of operation beforehand, thereby greatly improving reliability of a system.

The invention provides an RAID (Redundant Array of Independent Disk) data self-repairing method. According to the method, data are reserved segmentally, so that the shifting performance can be improved, and the addressing distance is reduced; data can be shifted in a laminated way, so that convenience is brought to management; reserved areas are scattered, so that bad sectors are prevented from being generated in a certain area in a centralized way, or a certain reserved area can be shifted when damaged; and segmental reservation is adopted, even though one or more reserved areas are damaged, shifting to a global reserved area can be continued.

The invention discloses a defragmentation method, a terminal device and a computer readable storage medium. The method comprises following steps: obtaining a first file parameter and a second file parameter; the first file parameter is used for describing the fragmentation degree of a file and the second file parameter is used for describing the frequency of the file being operated; determining the defragmentation assessment parameter of the file according to the first file parameter and the second file parameter; when the defragmentation assessment parameter is larger than a preset threshold value, performing disk defragmentation on the file. The invention provides a defragmentation method, a terminal device and a computer readable storage medium. The fragmentation degree of a file is assessed through combining frequency of the file being accessed and the frequency of the file being corrected so as to determine whether to perform defragmentation; combined with scattered fragmented sections, gathering parts into a whole, carrying the fragmented sections to another continuous block of the same block group so as to avoid the amount incensement of bad sectors and prolong storage service life.

The invention relates to a method for programming programs into embedded equipment, which comprises the following steps of: dividing program files to be programmed into a Boot Loader and other programming files stored in a SD (Secure Digital) card; increasing and modifying an open source of the Boot Loader and writing the increased and modified Boot Loader into the embedded equipment by a universal programmer; and operating a Boot Loader program and programming other programming files into a FLASH of the embedded equipment by utilizing a file in the SD card. The invention also provides a system for programming the programs into the embedded equipment, which comprises a Boot Loader module (1) and a programming module (2). The method and the system for programming the programs into the embedded equipment have the advantages that the universal programmer only needs to program the Boot Loader, so that the influence on a bad sector is reduced; the programming of all the programs to be programmed can be completed by the SD card; and in the programming process, the man-machine interaction is implemented by voice and display prompting.

A method for correcting a formatting error in a flash memory is disclosed. An error in a first formatting of a first flash memory is discovered, and a second formatting is extracted from a second flash memory storing second data. The erroneous first formatting is replaced with a modification of the second formatting, and first data is stored in the first flash memory with the modification of the second formatting. The first data is different from the second data.

The invention provides a data resource pre-warning method based on hard disk performances. Pre-warning of data on a hard disk is realized according to hard disk performance variations including the read-write speed variation of the hard disk and the utilization ratio variation of the hard disk, and slow data query reaction, important data loss and even complete data damage loss on the hardware due to factors such as hard disk and hardware ageing, high hard disk utilization ratio, multiple bad tracks of the hard disk and the like are avoided, so that important data of the hard disk are protected. A systematic structure of the data resource pre-warning method based on the hard disk performances comprises a hard disk performance monitoring unit and a data migration unit, wherein the hard disk performance monitoring unit is responsible for monitoring the performances of the hard disk of a computer and sending warning information to a client side, and the data migration unit is responsible for completing migration of the important data of the computer.

The present invention discloses a method utilizing flash memory, which comprises the following steps: scanning and classifying flash memory according to quality of flash memory; storing data of corresponding importance according to flash memory classify result; setting page of bad sector to be write-inhibiting page and page have no bad sector to be normal page according to scan result; executing the first scheduled operation to normal page when number of scanned bad sector smaller than or equal to preset value; executing the second scheduled operation to normal page when number of scanned bad sector bigger than the preset value. Flash memory is classified according to flash memory quality, data of corresponding importance is stored on the basis of classification, page has no bad sector is set to be normal page, and corresponding storage procedure to normal page is executed according to number of bad sector, hence normal page has no bad sector in flash memory is effectively utilized for data storage, and utilization ratio of flash memory is improved.

A method for correcting a formatting error in a boot sector of a hard disk drive is disclosed. An error in a first formatting of a first hard disk drive is discovered, and a second formatting is extracted from a second hard disk drive storing second data. The erroneous first formatting is replaced with a modification of the second formatting, and first data is stored in the first hard disk drive with the modification of the second formatting. The first data is different from the second data.

The invention provides method and device for treating a bad sector in an RAID5 disk array, and belongs to the technical field of data error tolerance storage. The method is that a reserved disk is added to the RAID5 disk array, and the bad sector in the disk is marked with an array bitmap; as reading-writing reaches the bad sector, the data in the bad sector are transferred to the same position in the reserved disk, and the bitmap is set at the same time; and as bitmap scanning reaches the bad sector, the reading-writing operation is performed from the same position in the reserved disk. The method and device for treating the bad sector in the RAID5 disk array improve the storage performance and reliability of the RAID5 array.

Data requested from a disk drive by a host is read continuously from sectors in tracks on a rotating disk and is temporarily stored in buffer memory within the disk drive. Before releasing the sectors for host access, each sector is checked for errors, and if errors are identified, error correction is attempted in a correction engine, using a selected error correction facility. If the errors are not corrected using the first selected correction facility, the bad sector is held in the buffer memory until the correction engine is idle. The correction engine is idle, for example, when good sectors (which have no errors) are read and are immediately released for host access. This idle time in the correction engine is used to attempt error correction using one or more different correction facilities. If the errors are corrected using the correction engine's idle time, it is not necessary to re-read the sector.

The embodiment of the invention provides a data recovery method and device for a bad sector of a logic unit. The method comprises the following steps: a host computer inquires a bad sector of a logic unit from a hardware array; the host computer receives identification information of the bad sector of the logic unit, transmitted by the hardware array; and the host computer recovers data stored in the bad sector of the logic unit according to the identification information of the bad sector of the logic unit. In the embodiment of the invention, the host computer can be used for actively recovering the data stored in the bad sector of the logic unit, so that the problem that the data stored in the bad sector of the logic unit cannot be passively recovered until access to the bad sector of the logic unit is triggered by the host computer through a service in the prior art is solved, and the recovery timeliness is enhanced.

Optical discs, such as CDs, have been protected by the use of an authenticating signature which cannot be copied to another disc. A playing device is required to identify the existence of the authenticating signature in order to access the content of the disc. The authenticating signature may comprise bad sectors at known locations. CD writers now available to consumers allow error detection and error correction data to be specified and this has led to circumvention techniques designed to simulate an original disc. During the writing of a copy disc, bad sectors are identified and provided with alternative data together with incorrect error detection and error correction data. When the copy disc is played bad sectors are reported in exactly the same locations as reported by the original disc thereby enabling the disc to be played even though it is a copy. To defeat techniques which use the error detection and error correction data to circumvent the copy protection, it is proposed to store authenticating signatures in sectors in Mode 2 format. Sectors formatted in this way are not subject to error detection and correction.

The invention provides a method and a system for detecting data retention of a flash memory. The method comprises the following steps: marking bad sectors detected for the first time can be marked; comparing the total quantity of bad sectors detected for the second time with the total quantity of the marked bad sectors and the total quantity of the bad sectors detected for the first time, so that whether the flash memory passes the data retention detection or not can be quickly judged, and the trouble that in the prior art, the addresses of the bad sectors detected twice need to be compared one by one can be avoided. Therefore, the method provided by the invention is relatively simple, quick and effective, and can be applied to multi-sector repairing and read-write management for the flash memory.

The invention discloses a method and device for simulating a logic hard disk test by using a bad sector log sheet. The device comprises an option read only memory, the bad sector log sheet and a hard disk firmware, wherein the option read only memory is used for receiving and executing an entity requirement command; the bad sector log sheet is arranged in the option read only memory, and is used for executing the entity requirement command in the option read only memory and providing bad sector set information for the option read only memory; and the hard disk firmware is arranged out of the range of the set information of a bad sector and is used for providing a hard disk data reading and writing command to read and write the hard disk. When the bad sector log sheet is utilized to stimulate the data in the block of the bad sector, no data are necessary to be written in the hard disk and a real block of the bad sector is also not necessary to be manufactured, thereby improving the test speed of a logic disk.