Semiconductor memory card, access device and method

An access device for accessing a semiconductor memory card in which a plurality of continuous sectors are grouped into a block as a minimum unit for data erasing and stored data is managed according to a file system comprising:

• a card information acquisition part for acquiring information on access condition as condition at the time when said access device accesses said semiconductor memory card and access performance which said semiconductor memory card realizes when said access device performs access on said access condition from said semiconductor memory card;
• a card use condition storage part for storing information on access condition which can be used when said access device accesses said semiconductor memory card and information on access rate desirable for said semiconductor memory card;
• an access condition determination part for determining access condition on the basis of the information acquired by said card information acquisition part, information on access performance of said semiconductor memory card and information stored in said card use condition storage part;
• a file system control part for acquiring access condition determined by said access condition determination part and performing file access suitable for said access condition;
• and
• an access control part for accessing said semiconductor memory card in response to an access request from said file system control part.

An access method for accessing a semiconductor memory card in which a plurality of continuous sectors are grouped into a block as a minimum unit for data erasing and stored data is managed according to the file system comprising:

• a card use condition storage step for storing information on access condition which can be used when accessing said semiconductor memory card and information on access rate desirable for said semiconductor memory card;
• a card information acquisition step for acquiring information on access on access condition as condition at the time when said access device accesses said semiconductor memory card and access performance which said semiconductor memory card realizes when said access device performs access on said access condition from said semiconductor memory card;
• an access condition determination step for determining access condition on the basis of the information acquired in said card information acquisition step and information stored in said card use condition storage step;
• and
• a file system control step for acquiring access condition determined in said access condition determination step and accessing a file in said semiconductor memory card so as to meet said access condition.