| CPC G06F 3/0658 (2013.01) [G06F 3/0656 (2013.01); G06F 3/0604 (2013.01); G06F 3/0679 (2013.01)] | 20 Claims |
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1. A memory system comprising:
a nonvolatile memory; and
a memory controller including:
a host interface configured to communicate with a host in accordance with a first interface protocol, according to which write data is communicated in units of a sector having a first size;
a memory interface configured to communicate with the nonvolatile memory in accordance with a second interface protocol, write data is communicated in units of a second size greater than the first size; and
a write buffer configured to temporarily store data of a third size in each of a plurality of entries thereof, the third size being equal to the second size or 1/N of the second size, N being a natural number, each of the entries being reserved to store data of a plurality of sectors that are associated with a continuous logical address range, each of the plurality of sectors having the first size, wherein
the memory controller is configured to:
select one of the entries in which write data is to be stored;
determine whether the selected entry is missing data of any sector;
in response to determining that the selected entry is missing data of at least one sector, perform a host inquiry by transmitting a request to the host for the missing data via the host interface;
in response to receiving the missing data from the host via the host interface, store the missing data in the selected entry; and
when the selected entry is not missing data from any of the sectors, perform a write operation to store the data of the third size in the selected entry into the nonvolatile memory at a continuous physical address range thereof.
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