Patent ID: 11966626
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A flash storage device, comprising:
a flash memory having non-volatile memory cells organized into blocks, wherein the blocks are switchable between a multi-bit mode for storing data in the non-volatile memory cells and a single-bit mode for storing the data in the non-volatile memory cells, wherein the blocks in the single-bit mode have a lower data storage density and a higher write endurance than the blocks in the multi-bit mode; and
a controller communicatively coupled to the flash memory, the controller configured to:
receive a write request from a host;
based, at least in part, on receiving the write request, determine whether a trigger event has occurred to switch one or more blocks from the multi-bit mode to the single-bit mode; and

based, at least in part, on the controller determining the trigger event has occurred:
switch the one or more blocks from the multi-bit mode to the single-bit mode;
store, in the single-bit mode, data associated with the write request in the one or more blocks at the lower data storage density;
calculate a new terabyte written (TBW) rating of the flash storage device based, at least in part, on the lower data storage density and the higher write endurance of the one or more blocks when in the single-bit mode; and
notify the host of the new TBW rating of the flash storage device.