Reuse of host hibernation storage space by memory controller

摘要

A method for data storage includes, in a host system that operates alternately in a normal state and a hibernation state, reserving a hibernation storage space in a non-volatile storage device for storage of hibernation-related information in preparation for entering the hibernation state. While the host system is operating in the normal state, a storage task other than storage of the hibernation-related information is performed using at least a portion of the reserved hibernation storage space.

主权项

1. A method for data storage, comprising:
operating a host system alternately between a normal state and a hibernation state; reserving a hibernation storage space in a non-volatile storage device to store hibernation-related information in preparation for the host entering the hibernation state, wherein the non-volatile storage device includes memory blocks allocated as a user data storage space, over-provisioning memory, and the hibernation storage space; and allocating at least a portion of the hibernation storage space as over-provisioning memory during operation in the normal state, thereby allowing the over-provisioning memory to be used as a cache for valid data from partially-programmed memory blocks in a user data storage space subsequent to an erasure operation being performed on one or more locations of the user data storage space.