STORAGE DEVICES AND METHODS OF OPERATING STORAGE DEVICES

摘要

A method of operating a storage device may include receiving a read command and a read address, performing a read operation on selected memory cells corresponding to a selected string selection line and a selected word line based on the read address and performing a reliability verification read on unselected memory cells. Data read by the read operation may be output to an external device, and data read by the reliability verification read may be not output to the external device.

主权项

1. A method of operating a storage device comprising a nonvolatile memory device and a memory controller configured to control the nonvolatile memory device,
wherein the nonvolatile memory device comprises a plurality of memory blocks, each memory block comprising a plurality of memory cells connected to word lines and stacked a direction perpendicular to a substrate and string selection transistors connected to string selection lines, wherein, in each memory block, memory cells located at a same height from the substrate are connected to a wordline in common, and wherein the method comprises:
receiving a read request;performing a read operation on selected memory cells associated with a selected string selection line and a selected word line in a selected memory block in response to the read request;performing a first reliability verification read on memory cells associated with an upper or lower word line of the selected word line and the selected string selection line in the selected memory block; andperforming a second reliability verification read on memory cells associated with an upper or lower word line of the selected word line and an unselected string selection line in the selected memory block.