Patent ID: 9569113
Date: 2017-02-14
CPC Classifications: G06F

Claim:
1. A data storage device comprising: a semiconductor storage memory including a plurality of physical blocks each including a plurality of physical pages; an information memory configured to store mapping relation between disk information and/or file information transmitted from a host device and physical block addresses of the plurality of physical blocks; and a controller configured to process a write request, which is received from the host device, on one or more physical blocks each having a physical block address related to information on disk and/or file included in the write request with reference to the mapping relation stored in the information memory, wherein the one or more physical blocks do not include a physical page having a data unrelated to the information on disk and/or file included in the write request, and wherein when a host request is received to delete a file and/or a disk related to the information on disk and/or file included in the write request, the controller invalidates some or all physical pages each included in the one or more physical blocks and the controller deletes a mapping relation corresponding to the information on disk and/or file included in the write request from the information memory and the one or more physical blocks do not include a valid physical page having a data unrelated to the information on disk and/or file included in the write request thereafter.