Memory system having storage device and memory controller and operating method thereof
AssigneeSK hynix Inc.
InventorJiman HONG
Life of this patent
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Abstract
A memory system includes: a storage device including a plurality pages for storing data; and a memory controller configured to determine, when sudden power-off occurs, whether there is a high probability of a program disturb of unselected pages sharing a word line coupled to a selected page among the pages in rebooting, and output a command to perform an over-write operation for programming data in the selected page or skip the over-write operation, based on a result of the determination.
Claims21
A memory system comprising:
- a storage device including a plurality pages for storing data;
- and
- a memory controller configured to determine, when sudden power-off occurs, whether there is a high probability of a program disturb of unselected pages sharing a word line coupled to a selected page among the pages in rebooting, and output a command to perform an over-write operation for programming data in the selected page or skip the over-write operation, based on a result of the determination.
A method for operating a memory system, the method comprising:
- performing rebooting after sudden power-off;
- determining, in the rebooting, whether there is a high probability of a program disturb of unselected pages coupled to the same word line as a selected page;
- performing, when it is determined that there is not the high probability of the program disturb, an over-write operation of writing data in the selected page;
- and
- skipping, when it is determined that there is the high probability of the program disturb, the over-write operation of the selected page.
A method for operating a memory system, the method comprising:
- performing rebooting after sudden power-off;
- determining, in the rebooting, whether there is a high probability of a program disturb of unselected pages coupled to the same word line as a selected page according to a number of over-write operations performed on the selected page;
- performing, when it is determined that there is not the high probability of the program disturb, the over-write operation on the selected page;
- and
- newly selecting, when it is determined that there is the high probability of the program disturb, a page different from the selected page, and performing the over-write operation on the newly selected page.
A memory system comprising:
- a memory device including a plurality of pages;
- and
- a memory controller configured to control, when a write operation is interrupted to a first page among the pages due to a sudden power off, the memory device to perform an over-write operation to a second page,
- wherein the second page has neighboring pages sharing a word line therewith and the neighboring pages have a low probability of a program disturb, and
- wherein the memory controller selects a candidate page as the second page based on a result of a read operation to neighboring pages of the candidate page or based on a number of the over-write operations previously performed to the candidate page among the pages.
Dependencies are inferred from the claim text.