A system which identifies a memory device using a physical unclonable function. The system performs raw read operations on every page of a block; sorts the pages into low and high groups using an average number of ones based on the raw read operations; generates unordered page pairs by sequentially selecting a first page from the low group and a second page from the high group; generates ordered page pairs by selectively converting an order of pages in each pair of the unordered page pairs; and generates a sequence for identifying the selected block based on comparing the average number of ones for pages in each ordered page pair.

Methods, systems, and devices for logic remapping techniques are described. A memory system may receive a write command to store information at a first logical address of the memory system. The memory system may generate a first entry of a logical-to-physical mapping that maps the first logical address with a first physical address that stores the information. The memory system may perform a defragmentation operation or other remapping operation. In such a defragmentation operation, the memory system may remap the first logical address to a second logical address, such that the second logical address is mapped to the first physical address. The memory system may generate a second entry of a logical-to-logical mapping that maps the first logical address with the second logical address.

There is provided a method for managing a solid state storage system with hybrid storage technologies. The method includes monitoring one or more storage request streams to identify operating mode characteristics therein from among a set of possible operating mode characteristics. The set of possible operating mode characteristics correspond to a set of available operating modes of the hybrid storage technologies. The method further includes identifying a current operating mode from among the set of available operating modes responsive to the identified operating mode characteristics. The method also includes predicting a likely future operating mode responsive to variations in workload requirements to generate at least one future operating mode prediction. The method additionally includes controlling at least one of data placement, wear leveling, and garbage collection, responsive to the at least one future operating mode prediction.

A vehicle memory sub-system can be switched from a normal mode to a pre-shutdown mode and initiate a media management operation before shutting down. The mode switch and/or media management operation can be performed in response to receiving a shutdown or pre-shutdown command for the vehicle. After completion of the memory management operation the vehicle and/or memory sub-system can be shutdown.

A host Flash Translation Layer (FTL) synchronizes host FTL operations with the drive FTL operations to reduce write amplification and over-provisioning. Embodiments of FTL synchronization map, at the host FTL software (SW) stack level, logical bands in which data is managed, referred to as host bands, to the physical bands on a drive where data is stored. The host FTL tracks validity levels of data managed in host bands to determine validity levels of data stored in corresponding physical bands, and optimizes defragmentation operations (such as garbage collection processes and trim operations) applied by the host FTL SW stack to the physical bands based on the tracked validity levels.

A system includes a memory device, and a processing device, operatively coupled to the memory device, to perform operations including receiving a request to sequentially write data to a block of a memory device, in response to receiving the request, writing the data to the block to obtain sequentially written data, initiating accumulation of logical-to-physical (L2P) mapping data corresponding to the sequentially written data, determining that a criterion for terminating the accumulation of the L2P mapping data is satisfied, in response to determining that the criterion is satisfied, terminating the accumulation of the L2P mapping data to obtain accumulated L2P mapping data, and updating an L2P mapping data structure based on the accumulated L2P mapping data.

A variety of applications can include systems and/or methods of partial save of memory in an apparatus such as a non-volatile dual in-line memory module. In various embodiments, a set of control registers of a non-volatile dual in-line memory module can be configured to contain an identification of a portion of dynamic random-access memory of the non-volatile dual in-line memory module from which to back up content to non-volatile memory of the non-volatile dual in-line memory module. Registers of the set of control registers may also be allotted to contain an amount of content to transfer from the dynamic random-access memory content to the non-volatile memory. Additional apparatus, systems, and methods are disclosed.

Methods, systems, and devices for retiring pages of a memory device are described. An ordered set of device information pages may be used to store device information. The device information pages may be in non-volatile memory. Each page may include a counter value of the number of accesses to indicate if the page includes valid data. A flag associated with the page may be set when the counter value reaches a threshold, to retire the page. Upon power-up, the device may determine which page to use, based on the flags. The flag may be stored in the page, or may be separate (e.g., fuse elements). If fuse elements are used, the page may store a programming-in-process flag to indicate when programming of the fuse element may not have been completed before power loss, in which case the programming may be restarted after power is restored.

A method of performing a garbage collection operation on a source block includes: performing a plurality of partial page clean operations during a series of host write operations. Each partial clean operation includes: performing a validity check process within a partitioned searching range of the source block to obtain valid page information; and performing a page clean process according to the valid page information and a target clean page number to read valid pages indicated by the valid page information.

A method for block addressing is provided. The method includes moving content of a data block referenced by a logical block address (LBA) from a first physical block corresponding to a first physical block address (PBA) to a second physical block corresponding to a second PBA, wherein prior to the moving a logical map maps the LBA to a middle block address (MBA) and a middle map maps the MBA to the first PBA and in response to the moving, updating the middle map to map the MBA to the second PBA instead of the first PBA.