Sandisk Technologies Inc.

Bishwajit Dutta

Narendhiran Cr

Sharath Shivakumar

A multi-meta-die data storage device disclosed herein routes host writes in such a way to prevent the need for inter-meta-die active wear leveling. In making the meta-die selection, a controller of the data storage device can consider both the average number of program-erase cycles (PEC) of the meta-die, as well as a parameter that indicates the effort required to relocate data from the meta-die to another meta-die. The controller can use this information to normalize PEC among the meta-dies and select the meta-die with the lowest final relocation effort for opening a new block for host writes. This can minimize relocations from active wear leveling.

Data storage device and method for data routing for wear levelling in multi-meta-die data storage devices

A data storage device includes a write abort prediction system that monitors a number of write aborts that occur over a monitoring period. The write abort prediction system uses the monitored number of write aborts to predict or determine a probability regarding whether one or more write aborts will occur over another monitoring period. If the probability is over a write abort threshold, the write abort prediction system determines an operating state of the data storage device. Depending on the operating state of the data storage device and the determined probability, the write abort prediction system determines whether to alter the functionality of the data storage device. Altering the functionality of the data storage device reduces the risk that the data storage device will enter a read-only mode should one or more write aborts occur during execution of various commands.

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Bengaluru, India

Bishwajit Dutta