Abstract: Techniques are provided for capturing a processing state snapshot of a device under test (DUT) that enable a previous test run to be restored and resumed from the same point the snapshot was taken. The techniques enable restoring the snapshot into the same or a different device to resume a previous test run. In an illustrative example, a DUT is controlled by a Joint Test Action Group (JTAG) test controller to capture a Steady State Snapshot by controlling peripheral components of the DUT to complete any on-going tasks to reach a steady state and then flush data to a memory of the DUT. The flushed steady state peripheral component data and other processing state data is transferred to the test controller for analysis and for enabling the subsequent restore and resume operation. Solid state drive (SSD) examples are provided.

Abstract: A data storage device includes a memory device and a controller coupled to the memory device. When a boot operation of the data storage device is initiated, the controller retrieves a relevant boot file from the memory device to boot the data storage device with. The relevant boot file to be retrieved from a plurality of boot files may be determined by a write temperature corresponding to the temperature of when the boot file was programmed to the memory device and a read temperature of the boot file during the boot operation. Each boot file of the plurality of boot files is programmed using different programming parameters in order to cover a range of possible retention levels.

Abstract: Systems and methods for devices connected by a control bus to share configuration data for accelerating physical link negotiation for a peripheral interface are described. Computer devices, such as data storage devices, may include a peripheral interface configured to connect to a host system and a control bus interface to connect to a control bus. Other devices on the same control bus may establish peer communication through the control bus interface to share configuration data, such as coefficients for physical link negotiation of the peripheral interface. To accelerate reestablishing communication through the peripheral interface, the device may receive previously stored configuration data from another device over the control bus.

Abstract: Systems and methods for peer data storage device messaging over a control bus for power management are disclosed. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer data storage devices may establish peer communication through the control bus interface, determine a power state, receive a power change indicator from a peer data storage device, and initiate a change in their power state. The peer data storage devices may manage their collective power as a power pool and increase or decrease power use without host intervention.

Abstract: A data storage device and method for reducing read disturbs when reading redundantly-stored data are provided. In one embodiment, a data storage device is provided comprising a memory and a controller. The memory is configured to redundantly store a plurality of copies of data, wherein the plurality of copies of the data comprise a primary copy of the data and at least one secondary copy of the data. The controller is configured to randomly select one of the plurality of copies of the data instead of selecting the primary copy of the data as a default; and read, from the memory, the randomly-selected one of the plurality of copies of the data. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.

Abstract: Systems and methods for offloading data storage processing tasks from a data storage device to a graphics processing unit data are described. Data storage devices may include a peripheral interface configured to connect to a host system and provide access to a host memory buffer. The data storage device may store task input data to the host memory buffer. The data storage device may notify a processor device including the graphics processing unit to initiate the storage processing task. The processor device may access the task input data from the host memory buffer and store the task output data to the host memory buffer for access by the data storage device.

Abstract: Systems and methods for peer data storage device messaging over a peer channel, such as a control bus, for vulnerability management are disclosed. Storage devices may include a host interface configured to connect to a host system and a peer interface to establish peer communication independent of host availability. The storage devices may determine security issues (for themselves or for peer storage devices) and send a threat notification through the peer interface, enabling peer storage devices to respond to peer security threats without relying on their host connections.

Abstract: A data storage device and method for preventing data loss during an ungraceful shutdown are provided. In one embodiment, a data storage device is provided comprising a volatile memory; a non-volatile memory; and a controller. The controller is configured to detect an ungraceful shutdown; and in response to detecting the ungraceful shutdown: generate a reduced set of parity bits for data stored in the volatile memory, wherein the reduced set of parity bits comprises fewer parity bits than a full set of parity bits used in a graceful shutdown; and store the data and the reduced set of parity bits in the non-volatile memory. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.

Abstract: Reset operations impact data storage device latency. Every reset operation involves flushing cache data to the memory device and resetting the front end application specific integrated circuit (ASIC) accelerator/host interface module (HIM). Multiple resets that are performed consecutively waste valuable data storage device resources due to the duplication of the operations that every reset operation performs. Data storage device latency can be improved, as can data storage device idle time, by combining reset operations and removing duplicative operations. For example, for two different, but consecutive reset operations, the reset operations are performed by flushing the cache data and resetting the ASIC accelerator/HIM only once rather than repeat the operations for each reset operation. In so doing, the two reset operations complete reset operations faster than would otherwise occur.

Abstract: A data storage device includes a memory device and a controller coupled to the memory device. The controller is configured to store data mappings in an uLayer, where the uLayer includes a plurality of mSet updates, and where the uLayer is organized into a sorted section and an unsorted section, sort one or more of the plurality of mSet updates of the uLayer, and provide, to a host device, data stored in the memory device corresponding to a most recent update of a data mapping by ignoring non-recent updates for a read command associated with an mSet group of the sorted section.

Abstract: Systems and methods for peer data storage device messaging over a control bus for power management are disclosed. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer data storage devices may establish peer communication through the control bus interface, determine a power state, receive a power change indicator from a peer data storage device, and initiate a change in their power state. The peer data storage devices may manage their collective power as a power pool and increase or decrease power use without host intervention.

Abstract: A data storage device and method for preventing data loss during an ungraceful shutdown are provided. In one embodiment, a data storage device is provided comprising a volatile memory; a non-volatile memory; and a controller. The controller is configured to detect an ungraceful shutdown; and in response to detecting the ungraceful shutdown: generate a reduced set of parity bits for data stored in the volatile memory, wherein the reduced set of parity bits comprises fewer parity bits than a full set of parity bits used in a graceful shutdown; and store the data and the reduced set of parity bits in the non-volatile memory. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.

Abstract: A client node (CN) requests content from an access node (AN). Rule set ACR_CN is provided to CN and AN and ACR_AN is used by AN. A request sent by CN in violation of ACR_CN may be blocked and cause AN to block subsequent requests from CN that would be allowed per ACR_CN. A request blocked according to ACR_AN but not ACR_CN is blocked but subsequent requests may still be allowed according to ACR_CN and ACR_AN. Authenticated distribution of the ACR_CN and ACR_AN may be performed in cooperation with a controller using authenticated tokens (AT).

Abstract: Systems and methods for peer storage devices to share host control data are described. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer storage devices may establish peer communication through the control bus interface to share host control data, such as access parameters for host resources allocated to peer storage devices. A storage device may access host resources using access parameters allocated to that device, receive peer access parameters from a peer storage device, and access host resources allocated to the peer storage device using the peer access parameters. For example, a storage device may use a peer host memory buffer to store buffer data prior to releasing the host memory buffer allocated to it.

Abstract: A client node (CN) requests content from an access node (AN). Rule set ACR_CN is provided to CN and AN and ACR_AN is used by AN. A request sent by CN in violation of ACR_CN may be blocked and cause AN to block subsequent requests from CN that would be allowed per ACR_CN. A request blocked according to ACR_AN but not ACR_CN is blocked but subsequent requests may still be allowed according to ACR_CN and ACR_AN. Authenticated distribution of the ACR_CN and ACR_AN may be performed in cooperation with a controller using authenticated tokens (AT).

Abstract: Systems and methods for peer storage device messaging over a control bus to offload and back up internal operation data are disclosed. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer storage devices may establish peer communication through the control bus interface, select internal operation data, and send the internal operation data to other peer storage devices through the control bus. Responsive to a recovery event, peer storage devices may receive the offloaded internal operation data from another peer storage device.

Abstract: Systems and methods for peer storage device messaging over a control bus to offload and back up internal operation data are disclosed. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer storage devices may establish peer communication through the control bus interface, select internal operation data, and send the internal operation data to other peer storage devices through the control bus. Responsive to a recovery event, peer storage devices may receive the offloaded internal operation data from another peer storage device.

Abstract: Systems and methods for peer storage devices to share host control data are described. Storage devices may include a host interface configured to connect to a host system and a control bus interface to connect to a control bus. Peer storage devices may establish peer communication through the control bus interface to share host control data, such as access parameters for host resources allocated to peer storage devices. A storage device may access host resources using access parameters allocated to that device, receive peer access parameters from a peer storage device, and access host resources allocated to the peer storage device using the peer access parameters. For example, a storage device may use a peer host memory buffer to store buffer data prior to releasing the host memory buffer allocated to it.

Abstract: A client node (CN) requests content from an access node (AN). Rule set ACR_CN is provided to CN and AN and ACR_AN is used by AN. A request sent by CN in violation of ACR_CN may be blocked and cause AN to block subsequent requests from CN that would be allowed per ACR_CN. A request blocked according to ACR_AN but not ACR_CN is blocked but subsequent requests may still be allowed according to ACR_CN and ACR_AN. Authenticated distribution of the ACR_CN and ACR_AN may be performed in cooperation with a controller using authenticated tokens (AT).

Abstract: A client node (CN) requests content from an access node (AN). Rule set ACR_CN is provided to CN and AN and ACR_AN is used by AN. A request sent by CN in violation of ACR_CN may be blocked and cause AN to block subsequent requests from CN that would be allowed per ACR_CN. A request blocked according to ACR_AN but not ACR_CN is blocked but subsequent requests may still be allowed according to ACR_CN and ACR_AN. Authenticated distribution of the ACR_CN and ACR_AN may be performed in cooperation with a controller using authenticated tokens (AT).