Maintaining a synchronous replication relationship between two or more storage systems, including: receiving, by at least one of a plurality of storage systems across which a dataset will be synchronously replicated, timing information for at least one of the plurality of storage systems; and establishing, based on the timing information, a synchronous replication lease describing a period of time during which the synchronous replication relationship is valid, wherein a request to modify the dataset may only be acknowledged after a copy of the dataset has been modified on each of the storage systems.

A storage device includes a storage device communicably connected to a host; a nonvolatile memory configured to store calibration data of the host; and a calibration circuit configured to receive a descriptor from the host including the setting information and update the calibration data with the received setting information.

A method for managing a storage system includes initiating, by a hardware resource manager, a boot-up of a storage controller managing the storage system comprising a plurality of storage devices, making a determination, by the storage controller, that the storage controller is in a secured mode, based on the determination: identifying a security state of each of the plurality of storage devices, determining that a storage device of the plurality of storage devices is in an unsecured state, and based on the unsecured state, sending, by the storage controller, a security operation request for securing the storage device, obtaining a secure state response from the hardware resource manager corresponding to securing the storage device, and based on the secure state response, resuming operation of the storage controller based on the secure mode.

Methods, systems, and devices for volatile register to detect power loss are described. The memory system may receive a command to enter a first power mode having a lower power consumption than a second power mode. The memory system may store data in a register associated with the memory system before entering the first power mode (e.g., a low-power mode). The memory system may receive a command to exit the first power mode. The memory system may determine whether the data stored in the register includes one or more errors. The memory system may select a reset operation to perform to exit the first power mode based on determining whether the data stored in the register includes one or more errors.

A plurality of storage nodes in a single chassis is provided. The plurality of storage nodes in the single chassis is configured to communicate together as a storage cluster. Each of the plurality of storage nodes includes nonvolatile solid-state memory for user data storage. The plurality of storage nodes is configured to distribute the user data and metadata associated with the user data throughout the plurality of storage nodes such that the plurality of storage nodes maintain the ability to read the user data, using erasure coding, despite a loss of two of the plurality of storage nodes. A plurality of compute nodes is included in the single chassis, each of the plurality of compute nodes is configured to communicate with the plurality of storage nodes. A method for accessing user data in a plurality of storage nodes having nonvolatile solid-state memory is also provided.

Methods, systems, and devices for initializing memory systems are described. A memory system may transmit, to a host system over a first channel, signaling indicative of a first set of values for a set of parameters associated with communicating information over a second channel between a storage device of the memory system and a memory device of the memory system. The host system may transmit, to the memory system, additional signaling associated with the first set of values for the set of parameters. For instance, the host system may transmit a second set of values for the set of parameters, an acknowledgement to use the first set of values, or a command to perform a training operation on the second channel to identify a second set of values for the set of parameters. The memory system may communicate the information over the second channel based on the additional signaling.

A storage unit is disclosed. The storage unit may include an interface to a host and storage for a data. A receiver may receive from a host a boot power data. The boot power data may including a first power level and a duration. A circuit may boot the storage unit based at least in part on the boot power data. The storage unit may include a second power level, with the first power level greater than the second power level.

A plurality of computing devices are communicatively coupled to each other via a network, and each of the plurality of computing devices is operably coupled to one or more of a plurality of storage devices. One or more of the computing devices and/or the storage devices may be used to rebuild data that may be lost due to a power failure.

The disclosure describes a programmable power management system for NAND Flash devices. In one embodiment, dedicated match logic is provided to store program counters responsible for peak power consumption of one or more NAND Flash dies. Upon detecting that a current program counter equals a stored program counter, a high current enable signal is toggled causing at least one NAND Flash die to suspend operations, thereby reducing peak power consumption of the NAND Flash device.

A storage device and a storage system including the same are provided. The storage device includes a reference clock pin configured to receive a reference clock signal from a host, a reference clock frequency determination circuitry configured to determine a reference clock frequency from the reference clock signal received through the reference clock pin, and a device controller circuitry configured to perform a high speed mode link startup between the host and the storage device according to the reference clock frequency.