Internal copy-back with read-verify

摘要

Systems and methods for internal copy-back with read-verify are described. In one embodiment, a storage device includes a controller to select a first single level cell (SLC) page of a plurality of SLC pages on the storage device to transfer to a triple level cell (TLC) page. The controller, in conjunction with an error correcting code (ECC) decoder, read-verifies the first SLC page. Read-verifying the first SLC page includes reading the first SLC page to an internal page buffer, decoding the first SLC page read into the internal page buffer, determining a number of errors contained in the first SLC page based at least in part on the decoding, and verifying whether the number of errors contained in the first SLC page satisfies an error threshold. The controller transfers the first SLC page to the TLC page according to a result of read-verifying the first SLC page.

主权项

1. A storage device, the storage device comprising:
a controller to select a first single level cell (SLC) page of a plurality of SLC pages on the storage device to transfer to a triple level cell (TLC) page; the controller, in conjunction with an error correcting code (ECC) decoder, to read-verify the first SLC page, read-verifying the first SLC page comprising:
reading the first SLC page to an internal page buffer;decoding the first SLC page read into the internal page buffer;determining a number of errors contained in the first SLC page based at least in part on the decoding; andverifying whether the number of errors contained in the first SLC page satisfies an error threshold; and the controller to transfer the first SLC page to the TLC page according to a result of read-verifying the first SLC page.