| 摘要 |
In a data processing system comprising a host system and a memory device including a data storage medium of a predetermined size and corresponding capacity, a secure method of managing available capacity of the storage medium by: maintaining an authentication list comprising a plurality of entries including information uniquely identifying a plurality of memory devices; selecting a section of said data storage medium for data storage, said section having a size representing the available capacity of the memory device; and maintaining identification information in the memory device uniquely identifying the memory device. Further, in response to receipt in the host system of a request for changing the available capacity of the memory device: obtaining information from said memory device including said identifying information; searching said list to find an entry including identification information matching that obtained from the memory device to authorize said change; and if a match is found, then: generating a change command for directing the memory device to change said available capacity; sending the change command to the memory device; and the memory device executing said change command by steps including changing the size of said section.
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