Patent ID: 9431069
Filing Date: 2016-08-30
CPC Classification: G11C

Claim Text:
1. A management method for a memory system including a host and a nonvolatile memory, the management method comprising: determining whether the nonvolatile memory was normally or abnormally powered off in response to at least one of a command provided by the host to the nonvolatile memory and power-off data stored in the nonvolatile memory; only upon determining that the nonvolatile memory was abnormally powered off, searching for at least one erroneous page among pages of the nonvolatile memory by referencing metadata last stored in the nonvolatile memory before the abnormal power-off, wherein the metadata comprises a valid data page location; programming dummy data in the at least one erroneous pages before performing a normal program operation directed to the nonvolatile memory; and upon determining that the nonvolatile memory was normally powered off, extracting the valid data page location from the metadata, and erasing the power-off data stored in the nonvolatile memory before performing the normal program operation directed to the nonvolatile memory.