STORAGE DEVICE AND MEMORY SYSTEM

摘要

According to one embodiment, a storage device includes a storage portion storing a first entry, the first entry includes a first translation table corresponding between a first logical address and a first physical address on a nonvolatile memory, and a first state showing that data at the first physical address is a valid as data at the first logical address, and a controller adding a second entry in the storage portion and changing the first state to a second state when receiving a command from a host, the second entry includes a second translation table corresponding between a second logical address and the first physical address, and a third state showing that the first physical address of the second translation table is referring to the first physical address of the first translation table, the second state showing that the first physical address of the first translation table is shared with the first physical address of the second translation table.

主权项

1. A storage device comprising:
a nonvolatile memory; a storage portion storing a first entry, the first entry comprising a first translation table corresponding between a first logical address and a first physical address on the nonvolatile memory, and a first state showing that data at the first physical address is a valid as data at the first logical address; and a controller adding a second entry in the storage portion and changing the first state to a second state when receiving a command from a host, the second entry comprising a second translation table corresponding between a second logical address and the first physical address, and a third state showing that the first physical address of the second translation table is referring to the first physical address of the first translation table, the second state showing that the first physical address of the first translation table is shared with the first physical address of the second translation table.