Access device, information recording device, controller, and information recording system

An information recording device comprising:

• a non-volatile memory formed by a plurality of uniform physical blocks to which data is to be written, the plurality of uniform physical blocks including one specific physical block;
• a page cache control unit that, based on page cache information including information that allocates two or more specific logical addresses to the one specific physical block, manages the one specific physical block, the one specific physical block temporarily holding data to be recorded by the two or more specific logical addresses;
• and
• a memory control unit that records the page cache information to the non-volatile memory, wherein:
• when the information recording device writes updated data for one of the two or more specific logical addresses, if the one specific physical block has no free area, the information recording device obtains a new physical block,
• after writing the updated data to the new physical block from a head of the new physical block, the information recording device subsequently writes data for any other one of the two or more specific logical addresses to the new physical block.

A controller that controls an information recording device provided with a non-volatile memory formed by a plurality of uniform physical blocks to which data is to be written, the plurality of uniform physical blocks including one specific physical block, the controller comprising:

• a page cache control unit that, based on page cache information including information that allocates two or more specific logical addresses to the one specific physical block, manages the one specific physical block, the one specific physical block temporarily holding data to be recorded by the two or more specific logical addresses;
• and
• a memory control unit that records the page cache information to the non-volatile memory, wherein:
• when the information recording device writes updated data for one of the two or more specific logical addresses, if the one specific physical block has no free area, the information recording device obtains a new physical block,
• after writing the updated data to the new physical block from a head of the new physical block, the information recording device subsequently writes data for any other one of the two or more specific logical addresses to the new physical block.

An information recording system having an information recording device and an access device that accesses the information recording device,

• the information recording device comprising:
• a non-volatile memory formed by a plurality of uniform physical blocks to which data is to be written, the plurality of uniform physical blocks including one specific physical block;
• and
• a page cache control unit that, based on page cache information including information that allocates two or more specific logical addresses to the one specific physical block, manages the one specific physical block, the one specific physical block temporarily holding data to be recorded by the two or more specific logical addresses, and
• the access device comprising:
• a page cache information setting unit that notifies the information recording device of the two or more specific logical addresses allocated to the one specific physical block, said notification occurring prior to execution of processing for writing data to the non-volatile memory,
• wherein when the data is written to the non-volatile memory, the one specific physical block temporarily holds the data,
• when the information recording device writes updated data for one of the two or more specific logical addresses, if the one specific physical block has no free area, the information recording device obtains a new physical block,
• after writing the updated data to the new physical block from a head of the new physical block, the information recording device subsequently writes data for any other one of the two or more specific logical addresses to the new physical block.