Patent ID: 11886727
Assignee: KIOXIA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. The memory system according to claim 1, wherein
the controller is configured to:
receive, from the host, a first command for allocating one of the plurality of block groups as a physical storage region in an open state available in writing data, the first command including a first parameter indicating whether allocation of a block group having a second access speed lower than a first access speed is allowed;
when the first parameter of the received first command indicates that allocation of a block group having the second access speed is allowed, allocate one block group configured by the second type block group as the physical storage region in the open state; and
when the first parameter of the first command does not indicate that allocation of a block group having the second access speed is allowed, allocate one block group configured by the first type block group as the physical storage region in the open state.