Efficient garbage collection in a data storage device

摘要

A method includes determining which of a plurality of blocks of data in a data storage device having a plurality of memory devices to copy during garbage collection using a cost function based on a number of free pages and a number of replicated pages in each of the blocks, where the replicated pages include replicated data that is a copy of data stored in another storage device and determining not to copy one or more of the blocks of data during garbage collection based on the cost function.

主权项

1. A method, comprising:
responsive to a write command from an application on a host device, writing data to a data storage device having a plurality of memory devices, wherein the data includes an indicator that indicates whether or not the data is replicated data, the replicated data being a copy of data stored in another storage device; determining not to copy the data during garbage collection when the indicator indicates that the data is replicated data; and providing a notification to the application that the replicated data was erased and not copied.