Recording and reproducing data using batch erasable nonvolatile

Details Recording and reproducing data using batch erasable nonvolatile Recording and reproducing data using batch erasable nonvolatile

1992-11-05

1995-08-15

Robertson, David L.

G06F 1300

Patent

active

054427681

ABSTRACT:
In a recording and reproducing apparatus, a plurality of data groups having arbitrary data capacities are recorded in and reproduced from a memory card formed of a plurality of batch erasable semiconductor memories having equal capacities. At least one of the plurality of semiconductor memories is set to be a spare memory which does not contain recorded data. To erase only one data group, those data groups (other than the data group to be erased) stored in the same semiconductor memory containing the data group to be erased are recorded in the spare memory. Individual index data and card index data including updated reproduction order data and rewrite number data are also recorded in the spare memory. Thereafter, the semiconductor memory containing the data group to be erased is batch-erased and becomes a new spare memory.

REFERENCES:
patent: 5303198 (1994-04-01), Adachi et al.

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