| CPC G06F 12/10 (2013.01) [G06F 12/0246 (2013.01); G06F 2212/214 (2013.01)] | 20 Claims |
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1. A memory system comprising:
a first memory, which is a nonvolatile memory;
a second memory; and
a controller configured to:
store address mapping information in the first memory;
store, in the second memory, a mapping update data that is generated each time data writing to the first memory is performed;
upon an amount of mapping update data that have not been transmitted to the host reaching a threshold, transmit the address mapping information in the first memory and the mapping update data in the second memory to the host and cause the host to store updated address mapping information in a third memory in the host based on the address mapping information and the mapping update data from the memory system;
perform address mapping using the address mapping information in the first memory and the mapping update data in the second memory, when connection with the host is lost; and
when the second memory does not have sufficient vacancy:
control the host to transmit the updated address mapping information in the third memory to the memory system; and
update the address mapping information in the first memory using the updated address mapping information from the host and one or more mapping update data that have not been transmitted to the host.
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