Skhynix Inc.

Andrei Konan

Alexander Zapotylok

Igor Novogran

Sergei Peniaz

Yibo Zhang

Techniques to more readily identify issues that arise in connection with memory systems and streamline the analysis process. A detailed activity log is generate with corresponding start and stop traffic events to facilitate identification of problems in memory devices. Each event registered in the log includes numerous items of information. The information facilitates identifying the origin of a particular problem including when and where it occurred, thus making failure analysis (FA) both easier and faster.

Logging mechanism for memory system

Memory systems and method of operating the same enable debugging of a memory system with vendor unique (VU) commands without using a physical cable connection to a debugging port on the memory system. In one aspect, a Universal Asynchronous Receiver-Transmitter (UART) protocol is serialized over a VU host protocol. In another aspect, Joint Test Action Group (JTAG) may be performed over UART or serial advanced technology attachment (SATA).

Remote SSD debug via host/serial interface and method of executing the same

Devices, methods and instruction sets are provided for performing operations with respect to analyzing firmware. A firmware event tracker includes a tracker event log in which events occurring during execution of firmware are recorded as event-items and stored in volatile. Flushing of event-items from volatile memory to non-volatile memory via a flush strategy and flush access path. In other aspects, the stored tracker event log, is used for performing failure analysis of the firmware.

Firmware event tracking for NAND-based storage devices, and methods and instruction sets for performing the same

Memory systems and components thereof execute an improved garbage collection (GC) strategy in the case of multiple sudden power offs (SPOs). Such a memory system comprises a memory device including single-level cell (SLC) memory blocks grouped into super blocks (SLC SBs) and multi-level cell (MLC) memory blocks grouped into SBs (MLC SBs); and a memory controller to execute a flash translation layer (FTL) to perform a garbage collection (GC) operation. The memory controller executes the GC operation after a sudden power off (SPO) by determining each MLC SB with user data opened before the SPO to be an unsafe super block (UB), copying data from pages in a select one of the UBs to pages in the SLC SBs, and copying data from the pages in the SLC SBs to pages in a select MLC SB not determined to be a UB.

Garbage collection strategy for memory system and method of executing such garbage collection

Techniques are presented that more efficiently calculate data path protection (DPP) parity. Firmware is advantageously used for such calculation with limited or no calls to a DPP engine, depending on the type of host data. The techniques use linear code properties of the type of host data to enable the firmware to calculate DPP parity faster than using the DPP engine for all calculations.

Data path protection parity determination for data patterns in storage devices

A semiconductor memory system and an operating method thereof includes: a one-time-programmable memory device storing at least a customer identification (ID) identifying a customer; a memory device; and a memory controller including a processor, and coupled to the memory device, containing instructions executed by the processor, and suitable for authenticating whether a program is authorized by a controller provider for the customer in a first-level signature authentication, in accordance with a customer image format, authenticating whether the program is authorized by the customer in a second-level signature authentication, in accordance with a program image format, after the first-level signature authentication is passed, when the customer image indicates the second-level signature authentication, wherein the program image format is different than the customer image format, storing the program into the memory device after the first-level signature authentication and second-level signature authentication are passed, and executing the program after the program is authenticated.

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Minsk, Belarus

Andrei Konan