Sandisk Il Ltd.

Tal Sagy

Donald Ray Bryant-Rich

Systems and methods of finalizing a semiconductor memory are disclosed. A method includes receiving an instruction to finalize data at a data storage device that includes a controller coupled to a semiconductor memory. The data storage device also includes a status indicator to indicate a finalize status of the semiconductor memory. In response to receiving the instruction to finalize the data at the data storage device, the status indicator is set to a finalize value. Write to the semiconductor memory operations are prevented by the controller in response to the status indicator having the finalize value.

Management of write-protected data in a semiconductor memory

Systems and methods responsive to a data file deletion instruction are disclosed. A method includes receiving an instruction to delete a data file. The data file is stored at a plurality of persistent memory cells of a memory. The memory also stores a directory that includes a first entry corresponding to the data file. In response to receiving the instruction to delete the data file, multiple attribute bits of the first entry are programmed and also a first bit of the first entry is programmed. The first bit of the first entry is distinct from the multiple attribute bits. Programming the multiple attribute bits converts the first entry from a first entry type to a second entry type. Programming the first bit of the first entry indicates that the first entry has an unused status.

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Even Yehuda, Israel

Tal Sagy