1344 results about "Invalid Data" patented technology

A real-time frame authentication protocol is presented for in-vehicle networks. A frame identifier is made anonymous to unauthorized entities but identifiable by the authorized entities. Anonymous identifiers are generated on a per-frame basis and embedded into each data frame transmitted by a sending ECU. Receiving ECUs use the anonymous identifiers to filter incoming data frames before verifying data integrity. Invalid data frame are filtered without requiring any additional run-time computations.

A method of maintaining a solid-state drive so that free space within memory blocks of the drive becomes free usable space to the drive. The drive comprises cells organized in pages that are organized in memory blocks in which at least user files are stored. A defragmentation utility is executed to cause at least some of the memory blocks that are partially filled with data and contain file fragments to be combined or aligned and to cause at least some of the memory blocks that contain only invalid data to be combined or aligned. A block consolidation utility is then executed to eliminate at least some of the partially-filled blocks by consolidating the file fragments into a fewer number of the memory blocks. The consolidation utility also increases the number of memory blocks that contain only invalid memory. All of the memory blocks containing only invalid data are then erased.

A method and system for obfuscating sensitive data while preserving data usability. The in-scope data files of an application are identified. The in-scope data files include sensitive data that must be masked to preserve its confidentiality. Data definitions are collected. Primary sensitive data fields are identified. Data names for the primary sensitive data fields are normalized. The primary sensitive data fields are classified according to sensitivity. Appropriate masking methods are selected from a pre-defined set to be applied to each data element based on rules exercised on the data. The data being masked is profiled to detect invalid data. Masking software is developed and input considerations are applied. The selected masking method is executed and operational and functional validation is performed.

Methods and systems for displaying information related to securities to a user are provided. In an embodiment, a method may include storing securities quotes in a memory of a computer. The method may include receiving quote updates information. The received quote update information and the quotes stored in the memory of the computer may be compared via one or more criteria. For bid quotes, a first criterion may include determining if a quote stored in the memory of the computer is greater than the price of a quote update. For ask quotes, the first criterion may include determining if a quote stored in the memory of the computer is less than the price of a quote update. A second criterion may include determining if a timestamp associated with the quote update minus a timestamp associated with the quote stored in the memory of the computer is greater than a predetermined threshold time. If one or more of the criteria are met, the method may modify the quote in the memory of the computer. Modifying the quote may include, but is not limited to: changing a display color, changing a font style, inhibiting the quote from being displayed, and deleting the quote from the memory of the computer.

An apparatus for and method of enhancing the performance of a multi-port internal cached DRAM (AMPIC DRAM) by providing an internal method of data validation within the AMPIC memories themselves to guarantee that only valid requested data is returned from them, or properly marked invalid data. A modified technique for identifying bad data that has been read out of AMPIC memory devices in the system.

A meter data management system includes one or more application servers configured to receive, validate and estimate received meter data. The one or more application servers may include various memory/media elements for storing raw and transformed meter data as well as software in the form of computer-executable instructions, which are executed by a processor to implement a variety of functions, including establishing a mapping between the plurality of external devices and a plurality of preconfigured processing workbins (e.g., collections of meter channels in the same time zones), transforming the received meter data into a plurality of data files identified by timing parameter and workbin, validating data provided in each data file, estimating missing or invalid data, and automatically writing validated (and optionally estimated) data as import files to a database server. Such clean data files are then imported to one or more dedicated databases installed on the database server.

A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.

A communication processing apparatus that acts as a server for transmitting data to a client includes a data transceiver configured to carry out communications with the client; a rate controller configured to control a bitrate of data transmitted to the client; and a data processor configured to prepare data to transmit in accordance with the bitrate. The rate controller includes a throughput calculator configured to extract an effective data transmission and reception period not including an ineffective data transmission and reception period in a period during which a communication connection is maintained between the server and the client, and to calculate a maximum throughput on the basis of the length of the effective data transmission and reception period and the amount of data transmitted; and a bitrate setter configured to set a bitrate within a range of up to a maximum allowable bitrate corresponding to the maximum throughput calculated by the throughput calculator.

Systems and methods for garbage collection in a memory device are disclosed. The memory device includes a plurality of blocks that may be filled with data. In the event that the memory device needs to remove invalid data stored in the blocks, the memory device may perform a garbage collection process. To select the blocks for garbage collection, the memory device may examine both the number of invalid pages in the blocks and the health of the blocks (e.g., the program/erase cycles, erase speed, and program speed). Thus, the memory device may select the blocks for garbage collection that have the most invalid pages and are the healthiest. In this manner, the memory device may more evenly wear the blocks in the memory device.

A memory system includes a nonvolatile semiconductor memory having blocks, the block being data erasing unit; and a controller configured to execute; an update processing for; writing superseding data in a block, the superseding data being treated as valid data; and invalidating superseded data having the same logical address as the superseding data, the superseded data being treated as invalid data; and a compaction processing for; retrieving blocks having invalid data using a management tablet the management table managing blocks in a linked list format for each number of valid data included in the block; selecting a compaction source block having at least one valid data from the retrieved blocks; copying a plurality of valid data included in the compaction source blocks into a compaction target block; invalidating the plurality of valid data in the compaction source blocks; and releasing the compaction source blocks in which all data are invalidated.

In a semiconductor memory computer equipped with a flash memory, use of backed-up data is enabled. The semiconductor memory computer includes an address conversion table for detecting physical addresses of at least two pages storing data by designating a logical address from one of logical addresses to be designated by a reading request. The semiconductor memory computer includes a page status register for detecting one page status allocated to each page, and page statuses to be detected include the at least following four statuses: (1) a latest data storage status, (2) a not latest data storage status, (3) an invalid data storage status, and (4) an unwritten status. By using the address conversion table and the page status register, at least two data s (latest data and past data) can be read for one designated logical address from a host computer.

A computer system includes a South bridge logic that connects an expansion bus to one or more secondary expansion busses and peripheral devices. The South bridge logic includes internal control devices that are targets for masters on the expansion bus. The target devices couple to the expansion bus through a common expansion target interface, which monitors and translates master cycles on the expansion bus on behalf of the target devices. The South bridge includes an ACPI/power management logic capable of supporting a Device Idle mode in which selected I/O device may be placed in a low power state. To prevent cycles from being run to a device in a low power state, the ACPI/power management includes status registers that are used to determine when a device in low power mode is the target of an expansion bus cycle. If such a cycle occurs, the cycle is intercepted and an SMI signal is transmitted to the CPU. In addition, the target interface responds to the master by asserting a retry signal. When the transaction is retried, the cycle is passed to the target, which responds with an invalid data signal. The CPU by this time, or at some subsequent time realizes that the target was asleep based upon processing of the SMI signal. The CPU then either re-executes the cycle when the device is removed form the low power state, or else simply rejects the invalid data.

The invention discloses an erasing method of a memory block, which comprises the steps as follows: tendency between recovery efficiency and wear leveling is dynamically regulated according to degree of wear uniformity of a memory block containing invalid data to acquire a cleanness index value of the memory block, and then the memory block to be erased is determined according to the cleanness index value for data erasing. The invention further discloses an erasing device of the memory block, which comprises a dynamic regulation module, a cleanness index module and an erasing module. By providing a new calculation method of the cleanness index, the invention introduces a new parameter, which causes the wear leveling among blocks to be still effectively calculated when erasing times of the block approximates the erasing limit. Meanwhile, a dynamic regulation method is provided to dynamically regulate the tendency between the recovery efficiency and the wear leveling according to the degree of wear uniformity, thus ensuring that the garbage collection of a flash memory has more balanced performance and adaptive ability.

A method for caching specified data in an n-way set associative memory with a copy-back update policy consists of the following steps. First, a row of the associative memory, organized as a plurality of rows and having n ways per row, is selected according to the main memory address of the specified data. The main memory provides primary storage for the data being cached. If one of the ways of the selected row holds invalid data, the specified data is cached in the way holding the invalid data and the data caching process is discontinued. If all n ways of the selected row hold valid data, the following steps are performed. First, a replacement strategy is used to select a way from the selected row. If the way selected in accordance with the replacement strategy holds unmodified data, the specified data is cached in the way selected by the replacement strategy and the data caching process is discontinued. However, if the way selected by the replacement strategy holds modified data, the ways of the selected row are examined again to find a way that holds data from the currently open page of the main memory. If such at least one such way is found, the specified data is cached in one of the ways holding data from the open page, and the data caching process is discontinued. Finally, if none of the ways in the selected row meet the above criteria, the specified data is cached in the way previously selected by the replacement algorithm, and the method terminates.

Embodiments of the present invention disclose a technique for providing an indication whether data stored on a disk drive are invalid. As used herein, invalid data are data written prior to the disk drive being added to an array of the disk drives or data in a block that has become free and which has been removed from the corresponding parity block of the stripe. Knowing that the disk drive was written prior to the drive being added to the existing array or having data which has become invalid allows a storage server to ignore the invalid data and not to use it when computing parity (i.e., a data protection value computed as a result of a logical operation on data blocks in a stripe in the array of disk drives). This, in turn, eliminates the need to zero disk drives or to perform parity re-computation prior to using the disk drives.

Automating techniques provide a way to create efficient test programs for characterizing semiconductor devices, such as those on a silicon die sample. Typically, test program creation is a drawn out process involving data entry for every test to be run as part of the test program. The described techniques improve test algorithm selection and automatically populate the test algorithm data in creating the test program. The automatic population may occur by accessing test structure, header, and test algorithm catalogs. The test structure catalog contains physical data for the test program, while the header catalog contains global parameter values. The test algorithm catalog has all of the various test algorithms that may be run in a given test, where these test algorithms may be in a template form and specific to any number of different test language abstractions. After test program creation, a validation process is executed to determine if the test program data is valid. Invalid data may be flagged, in an example. Once validated, techniques are described for converting the validated test program into an executable form, by formatting the various test algorithm data in the test program into a form compatible with the applicable test language abstraction selected by the user or the tester.