Abstract: Provided is a method for monitoring a field based on augmented reality using a digital twin performed in a processor of a computing device of a manager located remotely from a physical space of a field, including: outputting a field twin model of a three-dimensional virtual space matched to the physical space of the field; acquiring location information of a field user for the physical space based on positioning sensor data received from a field sensor system arranged in the field; and displaying a first virtual content representing a location of the field user on the field twin model by matching location information of the field user for the physical space to the three-dimensional virtual space.

Abstract: Provided is a method for monitoring a field based on augmented reality using a digital twin performed in a processor of a computing device of a manager located remotely from a physical space of a field, including: outputting a field twin model of a three-dimensional virtual space matched to the physical space of the field; acquiring location information of a field user for the physical space based on positioning sensor data received from a field sensor system arranged in the field; and displaying a first virtual content representing a location of the field user on the field twin model by matching location information of the field user for the physical space to the three-dimensional virtual space.

Abstract: Implementations disclosed herein provide for sequential readback of program data in from a cached data region of a storage device. In particular, the disclosed technology provides for storing a sequence of logical addresses associated with execution of a program, the sequence of logical addresses including at least two consecutive logical addresses associated with non-consecutive data blocks in a user data region; writing data corresponding to the at least two consecutive logical addresses to sequential data blocks in a cached data region; determining that a sequence of read commands from a host computer is associated with the data; and reading the data from the cached data region.

Abstract: Technologies are described herein for adaptively controlling the size of a write cache in a storage device based on the time required to flush the cache. Upon receiving a write command at a controller for the storage device, an estimated cache flush time for the write cache is calculated based on the write commands contained therein. If the estimated cache flush time is greater than a maximum threshold time, the size of the write cache is decreased to control the cache flush time. If the estimated cache flush time is less than a minimum threshold time, the size of the write cache is increased to enhance random write performance.

Abstract: Implementations disclosed herein provide for sequential readback of program data in from a cached data region of a storage device. In particular, the disclosed technology provides for storing a sequence of logical addresses associated with execution of a program, the sequence of logical addresses including at least two consecutive logical addresses associated with non-consecutive data blocks in a user data region; writing data corresponding to the at least two consecutive logical addresses to sequential data blocks in a cached data region; determining that a sequence of read commands from a host computer is associated with the data; and reading the data from the cached data region.

Abstract: A cache control method for a hybrid hard disk drive (HDD) comprising a nonvolatile cache (NVC) and a hard disk. When the hybrid HDD is operating in a non-parallel mode of operation, the control method sequentially searches the NVC and then reads the hard disk for requested data, but when the hybrid HDD is operating in a parallel mode of operation, the control method simultaneously searches the NVC and reads hard disk for the data requested.

Abstract: Methods and apparatus for cache flush control and write re-ordering in a data storage system are provided. A cache flush control method includes cache flushing information stored in a cache memory to a first storage apparatus of a plurality of storage apparatuses included in a data storage system when a cache flush condition is generated, and performing a write command in a second storage apparatus of the plurality of storage apparatuses which has a write speed lower than the first storage apparatus according to information stored in the first storage apparatus processed with the cache flush.

Abstract: A data storing location managing method including generating an access frequency of a storing area accessed in a first storage apparatus according to a command received, copying data stored in the storing area of the first storage apparatus to a storing area of a second storage apparatus when the access frequency of the storing area of the first storage apparatus is greater than a reference value, and replacing location information of the storing area of the first storage apparatus with location information of the storing area of the second storage apparatus.

Abstract: Disclosed is a method for reading data in a memory system including a buffer memory and a nonvolatile memory, the method being comprised of: determining whether an input address in a read request is allocated to the buffer memory; determining whether a size of requested data is larger than a reference unless the input address is allocated to the buffer memory; and conducting a prefetch reading operation from the nonvolatile memory if the requested data size is larger than the reference.

Abstract: Disclosed is a method for reading data in a memory system including a buffer memory and a nonvolatile memory, the method being comprised of: determining whether an input address in a read request is allocated to the buffer memory; determining whether a size of requested data is larger than a reference unless the input address is allocated to the buffer memory; and conducting a prefetch reading operation from the nonvolatile memory if the requested data size is larger than the reference.

Abstract: A method of controlling a hybrid HDD to permanently deactivate a non-volatile cache support mode by determining whether a limit in the use of a non-volatile cache is passed, and a recording medium and apparatus suitable for the control method. The control method of a hybrid hard disk drive having a hard disk and a non-volatile cache includes determining whether an erasure number of the non-volatile cache exceeds a usage limit based on the erasure number of the non-volatile cache, and permanently deactivating a non-volatile cache support mode when the erasure number of the non-volatile cache is determined to exceed the usage limit.

Abstract: Disclosed is a method for reading data in a memory system including a buffer memory and a nonvolatile memory, the method being comprised of: determining whether an input address in a read request is allocated to the buffer memory; determining whether a size of requested data is larger than a reference unless the input address is allocated to the buffer memory; and conducting a prefetch reading operation from the nonvolatile memory if the requested data size is larger than the reference.

Abstract: A data storage system includes a non-volatile memory, a disc recording medium, a non-volatile memory buffer, operatively disposed between a host interface and the non-volatile memory, which stores a portion of data stored in the non-volatile memory, and a disc buffer, operatively disposed between the host interface and the disc recording medium, which stores a portion of data stored in the disc recording medium. The data storage system may be configured to receive an access address from a host operatively connected to the host interface, and sequentially determine whether the access address exists in one of the non-volatile memory buffer, the non-volatile memory, the disc buffer, and the disc recording medium, in that order.

Abstract: A method of converting a hybrid hard disk drive (HDD) to a normal HDD when a system is powered on depending on whether the total number of defective blocks in a non-volatile cache (NVC) exceeds a predetermined threshold. The method of converting a hard disk drive (HDD) from a hybrid HDD to a normal HDD where the HDD has a normal hard disk and a non-volatile cache includes the steps of determining whether a mode conversion flag is enabled during a power-on period. When the mode conversion flag is enabled, operating the HDD as a normal HDD. When the mode conversion flag is disabled, determining whether an operating mode of the HDD is a normal mode or a hybrid mode. When the operating mode of the HDD is in the normal mode, the HDD operates as a normal HDD. A determination is made when the HDD is in the hybrid mode as to whether the total number of defective blocks in the non-volatile cache is greater than a predetermined threshold.

Abstract: A data storage system includes a non-volatile memory, a disc recording medium, a non-volatile memory buffer, operatively disposed between a host interface and the non-volatile memory, which stores a portion of data stored in the non-volatile memory, and a disc buffer, operatively disposed between the host interface and the disc recording medium, which stores a portion of data stored in the disc recording medium. The data storage system may be configured to receive an access address from a host operatively connected to the host interface, and sequentially determine whether the access address exists in one of the non-volatile memory buffer, the non-volatile memory, the disc buffer, and the disc recording medium, in that order.

Abstract: A data storage system includes a non-volatile memory, a disc recording medium, a non-volatile memory buffer, operatively disposed between a host interface and the non-volatile memory, which stores a portion of data stored in the non-volatile memory, and a disc buffer, operatively disposed between the host interface and the disc recording medium, which stores a portion of data stored in the disc recording medium. The data storage system may be configured to receive an access address from a host operatively connected to the host interface, and sequentially determine whether the access address exists in one of the non-volatile memory buffer, the non-volatile memory, the disc buffer, and the disc recording medium, in that order.

Abstract: A data storing location managing method including generating an access frequency of a storing area accessed in a first storage apparatus according to a command received, copying data stored in the storing area of the first storage apparatus to a storing area of a second storage apparatus when the access frequency of the storing area of the first storage apparatus is greater than a reference value, and replacing location information of the storing area of the first storage apparatus with location information of the storing area of the second storage apparatus.

Abstract: Disclosed is a method for reading data in a memory system including a buffer memory and a nonvolatile memory, the method being comprised of: determining whether an input address in a read request is allocated to the buffer memory; determining whether a size of requested data is larger than a reference unless the input address is allocated to the buffer memory; and conducting a prefetch reading operation from the nonvolatile memory if the requested data size is larger than the reference.

Abstract: A method of converting a hybrid hard disk drive (HDD) to a normal HDD when a system is powered on depending on whether the total number of defective blocks in a non-volatile cache (NVC) exceeds a predetermined threshold. The method of converting a hard disk drive (HDD) from a hybrid HDD to a normal HDD where the HDD has a normal hard disk and a non-volatile cache includes the steps of determining whether a mode conversion flag is enabled during a power-on period. When the mode conversion flag is enabled, operating the HDD as a normal HDD. When the mode conversion flag is disabled, determining whether an operating mode of the HDD is a normal mode or a hybrid mode. When the operating mode of the HDD is in the normal mode, the HDD operates as a normal HDD. A determination is made when the HDD is in the hybrid mode as to whether the total number of defective blocks in the non-volatile cache is greater than a predetermined threshold.

Abstract: A data storage system includes a non-volatile memory, a disc recording medium, a non-volatile memory buffer, operatively disposed between a host interface and the non-volatile memory, which stores a portion of data stored in the non-volatile memory, and a disc buffer, operatively disposed between the host interface and the disc recording medium, which stores a portion of data stored in the disc recording medium. The data storage system may be configured to receive an access address from a host operatively connected to the host interface, and sequentially determine whether the access address exists in one of the non-volatile memory buffer, the non-volatile memory, the disc buffer, and the disc recording medium, in that order.