Abstract: Techniques manage data within storage equipment having a Flexible Data Placement (FDP) drive. The techniques involve configuring the storage equipment to support storing data in reclaim units of the FDP drive according to an initial group of reclaim unit handles. The techniques further involve detecting that a number of currently available reclaim units of the FDP drive has fallen below a first predefined threshold. The techniques further involve, in response to detecting that the number of currently available reclaim units of the FDP drive has fallen below the first predefined threshold, reconfiguring the storage equipment to support storing data in reclaim units of the FDP drive according to a smaller group of reclaim unit handles. The smaller group of reclaim unit handles has fewer reclaim unit handles than the initial group of reclaim unit handles.

Abstract: A memory management method for continuously recording digital content and a circuit system operating the method are provided. The circuit system includes a control circuit, a memory, and a storage device. The memory has a buffer that is defined as a pre-buffer or a main buffer based on a current recording mode. In the method, the circuit system loads continuously-received data and sequentially saves the data in the buffer that is defined as the pre-buffer in a first-in-first-out manner before a start-record instruction is received. After the start-record instruction is received, the data buffered in the pre-buffer is combined with the data that is continuously recorded to the main buffer. This file is then written to the storage device until a stop-record instruction is received.

Abstract: A method and controller for operating a memory system in communication with a host. The method and controller logically arrange a sequence of reclaim sub-groups within a memory device. The method and controller process the reclaim sub-groups according to the sequence to control the memory device to perform garbage collection on the reclaim sub-groups in the memory device. In the sequence, the reclaim sub-groups are processed during the garbage collection such that at least one re-ordered data sequence in the sequence of the reclaim sub-groups being processed has re-ordered valid data that is not clumped.

Abstract: Methods, systems, and devices for techniques for enhanced read performance on blocks of memory cells are described. The method may involve selecting a first block of memory cells from a set of blocks of memory cells of a memory system based on a condition of the first block of memory cells being met and setting one or more programming parameters corresponding to the first block of memory cells such that the one or more programming parameters are within a threshold value of one or more programming parameters corresponding to a second block associated with a storage density different from a storage density of the first block of memory cells. Further, the method may involve performing an operation on the block of memory cells according to the one or more programming parameters.

Abstract: According to an example of the present disclosure, a system is provided. A system may include a main memory including a dynamic memory cell electrically coupled to a bitline and a word line, and a memory controller configured to selectively omit a restore operation during a read operation of the dynamic memory cell.

Abstract: Provided is a memory system including a host system including a memory controller configured to control a read or write operation for a plurality of memory ranks, based on target or non-target information for the plurality of memory ranks, and a memory device including a storage configured to store on-die termination (ODT) information of the memory ranks. Here, the memory controller is further configured to determine a target rank to be read or written, and transmit information about the determined target rank, to the memory device, and the memory device is further configured to perform a comparison of the ODT information of the memory ranks stored in the storage with target or non-target information received from the memory controller, and change an ODT value of the target rank, based on target information received from the memory controller based on a result of the comparison.

Abstract: A method may include receiving, at a storage device, an input and/or output (I/O) request comprising a device indication performing a determination, at the storage device, that the device indication indicates the storage device, and servicing, by the storage device, the I/O request based on the determination. The device indication may include an address for the I/O request. The method may include installing a second storage device in the storage system. The second storage device may be installed seamlessly. The first and second storage devices may be peer devices. The method may further including receiving, at the first storage device, a second I/O request including a second device indication, performing a second determination, by the first storage device, that the second device indication indicates the second storage device, and forwarding, by the first storage device, the second I/O request to the second storage device based on the second determination.

Abstract: A storage device may be coupled to a host device and the storage device may support a host performance booster (HPB) feature. A controller on the storage device may execute a background relocation operation. During the background relocation operation, the controller may identify a block to relocate data from. The controller may also determine that a relocation system threshold has not been reached. The controller may execute a source selection algorithm configured to minimize HPB entry inactivation resulting from data relocation. The source selection algorithm may include a criterion to enable the controller to select a source block for relocation.

Abstract: An apparatus includes a memory configured to store data, and a processor. The processor configured to determine whether an access to the data is a local memory access; determine, based on a result of the determination of whether the access to the data is the local memory access, whether a page fault of the access occurred; determine, based on a result of the determination of whether the page fault occurred, whether the access is a remote access outside a socket; and perform, based on a result of the determination of whether the access is the remote access, the access to the data by copying the data onto a local memory.

Abstract: A method may include receiving, at a storage device, an input and/or output (I/O) request comprising a device indication performing a determination, at the storage device, that the device indication indicates the storage device, and servicing, by the storage device, the I/O request based on the determination. The device indication may include an address for the I/O request. The method may include installing a second storage device in the storage system. The second storage device may be installed seamlessly. The first and second storage devices may be peer devices. The method may further including receiving, at the first storage device, a second I/O request including a second device indication, performing a second determination, by the first storage device, that the second device indication indicates the second storage device, and forwarding, by the first storage device, the second I/O request to the second storage device based on the second determination.

Abstract: Systems and methods for performing a fast resynchronization of a mirrored aggregate of a distributed storage system using disk-level cloning are provided. According to one embodiment, responsive to a failure of a disk of a plex of the mirrored aggregate utilized by a high-availability (HA) pair of nodes of a distributed storage system, disk-level clones of the disks of a healthy plex may be created external to the distributed storage system and attached to the degraded HA partner node. After detection of the cloned disks by the degraded HA partner node, mirror protection may be efficiently re-established by assimilating the cloned disks within the failed plex and then resynchronizing the mirrored aggregate by performing a level-1 resync of the failed plex with the healthy plex based on a base file system snapshot of the healthy plex. In this manner, a more time-consuming level-0 resync may be avoided.

Abstract: A random read miss slot size selection engine is configured to select between multiple memory slot sizes to optimize slot size allocations for random read miss IO operations. Upon receipt of an IO operation that is a random read miss IO operation, the slot size selection engine obtains a metadata page encompassing multiple entries in addition to an entry associated with the random read miss IO operation. The slot size selection engine performs a metadata temporal analysis to analyze temporal information associated with previous slot allocations identified in the metadata page. The slot size selection engine also performs a metadata spatial analysis to spatially analyze previous slot allocations to neighboring tracks identified in the metadata page. In response to a determination that the metadata page contains a threshold number of recent slot allocations, the spatial analysis is used to determine the slot size to allocate to the random read miss.

Abstract: Described are systems and methods for prioritization of background media management operations in memory systems. An example system comprises a controller coupled to a memory array comprising a plurality of memory cells. The controller is configured to perform operations, comprising: identifying a plurality of address ranges referencing respective sets of memory cells of the memory array, wherein each address range is associated with a respective memory access operation counter reflecting a number of memory access operations that have been performed with respect to a corresponding set of memory cells; identifying, among the plurality of address ranges, an address range associated with a maximum value of a corresponding memory access operation counter; and causing a media management operation to be performed with respect to a set of memory cells referenced by the identified address range.

Abstract: A drive placement or placement functionality can enable initial copies of data to be placed on a drive in reclaim unit (HRUs) in a manner which is probabilistically more efficient from a garbage collection (GC) perspective and leverages knowledge of a host or application using the data. The placement functionality enables the advantages of fine-grained placement functionality while simultaneously allowing a storage device or storage drive to maintain NAND or other management responsibility, and not allocate that responsibility to an application or host device using the device.

Abstract: The present technology relates to an electronic device. According to the present technology, a host device may include a garbage collection controller and an idle time processor. The garbage collection controller may provide, to a storage device, a health information request command for requesting health information including a host write amount and a storage device write amount, provide, to the storage device, a first garbage collection control command for requesting garbage collection cost information based on the health information, provide, to the storage device, a second garbage collection control command for instructing to perform garbage collection based on the garbage collection cost information and an idle time of the storage device. The idle time processor may process information on the idle time.

Abstract: In some implementations, a memory device may determine, from a list of key-value pair sets, a key-value pair set. The memory device may identify, from the key-value pair set selected from the list of key-value pair sets, a first key that is included in at least one other key-value pair set from the list of key-value pair sets. The memory device may identify, from the key-value pair set selected from the list of key-value pair sets, a second key that is not included in at least one other key-value pair set from the list of key-value pair sets. The memory device may form a new key-value pair set that excludes the first key and includes the second key. The memory device may replace the key-value pair set selected from the list of key-value pair sets with the new key-value pair set.

Abstract: A data storage device and method are disclosed for host-controlled data compression. In one embodiment, a data storage device is provided comprising a memory and a controller configured to communicate with the memory. The controller is further configured to selectively compress target data, wherein the target data is only compressed in response to receiving a compression request from a host; receive the compression request from the host; and in response to receiving the compression request from the host, compress the target data. Other embodiments are disclosed.

Abstract: According to one embodiment, a memory system includes a non-volatile memory including a plurality of physical blocks and a controller. The controller is configured to allocate the plurality of physical blocks to a plurality of first block sets each including physical blocks among the plurality of physical blocks, generate a plurality of groups obtained by grouping the plurality of first block sets by the number of defective physical blocks included in each of the plurality of first block sets, and select a plurality of the first block sets from at least two groups of the plurality of groups to generate a second block set from the plurality of selected first block sets.

Abstract: Methods for recording commands in memory and providing the recorded commands. In one embodiment, a data storage controller includes a memory interface configured to interface with a memory, a controller memory including a storage firmware and a record mapping table, and a processor. The processor, when executing the storage firmware, is configured to receive a record identifier, receive a command including data to be stored in the memory, and create an entry in the record mapping table associating the record identifier with a logical block address of the command. The command is received after the record identifier. The processor may receive a playback identifier that includes the record identifier and determine, using the record mapping table, a location of the associated command in the memory. The command is provided to an external device.

Abstract: An application-level memory control group of a first application may be created when the first application is opened. An anonymous page of the first application is added to a least recently used linked list of the application-level memory control group, and a file page of the first application is added to a global least recently used linked list. An application-level memory control group is created in a dimension of an application, and an anonymous page of the application is managed in a refined manner. In addition, a file page of the application-level memory control group may be managed based on a global least recently used linked list.