An improved solid state drive (SSD). The SSD comprising a plurality of non-volatile memory dies, each configured to store at least one block of data associated with one of a plurality of superblocks each containing a plurality of blocks; a volatile memory; and a memory controller. The memory controller configured to store a bit map associated with a first superblock of the plurality of superblocks in the volatile memory, wherein the bit map is configured to indicate whether each of the plurality of blocks is a replacement block, store a block address list in the volatile memory, the block address list is configured to store an address of one or more replacement blocks, and store a replacement block index in the volatile memory associated with the first superblock of the plurality of superblocks, the replacement block index corresponding to the location of an address of a first replacement block of the first superblock in the block address list.

A garbage collection technology for a storage medium that includes a plurality of blocks, where each storage unit has a collection parameter related to data in one of the blocks, and where each block includes a plurality of pages. A group of blocks is selected from the plurality of blocks based on the collection parameter. A difference between values of collection parameters of any two blocks in the group of blocks is not greater than a preset value. Data in a first valid page and a second valid page in the group of blocks is replicated to a same destination block, to facilitate garbage collection.

A garbage data scrubbing method includes obtaining an input/output (IO) busy/idle status of a terminal at a current moment, where the IO busy/idle status includes a busy state and an idle state. When the IO busy/idle status of the terminal at the current moment is the idle state, a discard message is delivered to a storage device, where the discard message includes an initial address and a size of to-be-scrubbed physical space in the storage device, and where the discard message is used to unbind a mapping relationship between a physical address of the to-be-scrubbed physical space and a corresponding logical address.

A method of using flash storage devices with different sized erase blocks is provided. The method includes allocating a plurality of erase blocks of heterogeneous erase block sizes to a RAID stripe, to form a tile pattern having the heterogeneous erase block sizes in the RAID stripe. The method includes writing the RAID stripe across the flash storage devices in accordance with the allocating, and stopping the writing the RAID stripe, responsive to contents of the RAID stripe reaching a threshold.

A memory system includes a memory device including memory blocks, and a controller configured to generate a result indicative of whether a number of free memory blocks satisfies a reference after beginning of garbage collection for the memory device, selectively perform a journaling operation for a request based on the result, and program data, collected by the garbage collection, in the memory device.

A memory system of an embodiment includes a nonvolatile memory, a primary cache memory, a secondary cache memory, and a processor. The processor performs address conversion by using logical-to-physical address conversion information relating to data to be addressed in the nonvolatile memory. Based on whether first processing is performed on the nonvolatile memory or second processing is performed on the nonvolatile memory, the processor controls to store whether the logical-to-physical address conversion information relating to the first processing to be in the primary cache memory as cache data or logical-to-physical address conversion information relating to the second processing to be in the secondary cache memory as cache data.

A solid state drive management solution is provided, and includes: detecting that a usage status of a first storage space of an SSD meets a preset condition, where the first storage space works in a first mode; and enabling, based on the detection result, the first storage space to work in a second mode to obtain a second storage space, where a quantity of bits that can be stored in a cell in the first storage space is greater than a quantity of bits that can be stored in a cell in the second storage space.

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.

Techniques for on-the-fly adaptation of remembered set data structures are disclosed. Operations include initiating execution of an application thread and a garbage collection process for a heap memory including a first plurality of logical partitions, wherein each logical partition of the first plurality of logical partitions is associated with a remembered set data structure. While the application thread and the garbage collection process are executing, the system determines a set of characteristics. Based on the set of characteristics meeting threshold criteria for adjusting a first remembered set data structure corresponding to a first logical partition, the system identifies a first remembered set configuration corresponding to the first remembered set data structure, creates a replacement remembered set data structure based on the first remembered set configuration, and associates the replacement remembered set data structure with the first logical partition.

A method for page management in a memory system may include allocating a page of a mirror memory, copying a valid page from a block of device memory at a device to the page of the mirror memory, remapping the valid page from the block of device memory to the mirror memory, and modifying the block of device memory. The method may further include copying the valid page from the mirror memory to a free page at the device, and remapping the valid page from the mirror memory to the free page at the device. The remapping may be performed using a memory coherent interface. The method may further include deallocating a portion of the mirror memory associated with the valid page based on copying the valid page from the mirror memory.