STORAGE DEVICE

摘要

The present invention provides a storage device adopting a semiconductor device as a storage media having a nonvolatile property and must be erased for writing data, wherein the device divides and manages a logical storage space provided to a higher level device in logical page units, and manages a virtual address space which is a linear address space to which multiple physical blocks of the semiconductor device are mapped. The storage device uses a page mapping table managing a correspondence between a logical page and an address in the virtual address space, and a virtual address configuration information managing a correspondence between an area in the virtual address space and a physical block, in order to manage the correspondence between the respective logical pages and storage areas of the semiconductor device.

主权项

1. A flash memory storage device comprising a controller and multiple flash memory chips, comprising:
the controller comprising
a processor,a buffer composed of a volatile memory,a storage interface for connecting with a higher level device, anda flash memory interface for connecting the multiple flash memories with the controller; the processor, dividing a logical storage space being provided to the higher level device into logical pages units which are areas having a determined size for management, and managing a virtual address space which is a linear address space to which multiple physical blocks included in the multiple flash memory chips are mapped; and the processor further managing a page mapping table storing a correspondence between the logical page and an address in the virtual address space, and a virtual address configuration information storing a correspondence between an area in the virtual address space and the physical blocks.