| 摘要 |
PURPOSE:To shorten time required for retrieving and reading information by initially defining an area that can register and process A-pieces of information as one block and reserving the next area block capable of registering A-pieces of information when all said information is corrected and registered. CONSTITUTION:A-areas are prepared as a correction information registration area 2-1, and records and processes plural pieces of correction information K2-1, K3-1, K2-2, in that arising order as before. When the number of correction times in (n-1)th time in an initialized area, that is, information showing the correction of area (T2-0, Sn) is registered, the next correction information is reserved. Figure shows that a final registration area in a primary information area 0 is reserved as (T0-j-1, S0), the next sector (T0-j, Sn) as an index area, and S1-Sn as A-correction information areas. The reserved address information is taken for information on the next registration position, and correction index information being a key in the correction information area 2-1 is registered as A-pieces of mapping information in a lump.
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