US 11,636,033 B2 · System and method of direct write and mapping of data in a non-volatile memory having multiple sub-drives

Abstract

A system and method is disclosed for managing data in a non-volatile memory. The system may include a non-volatile memory having multiple non-volatile memory sub-drives. A controller of the memory system is configured to route incoming host data to a desired sub-drive, keep data within the same sub-drive as its source during a garbage collection operation, and re-map data between sub-drives, separate from any garbage collection operation, when a sub-drive overflows its designated amount logical address space. The method may include initial data sorting of host writes into sub-drives based on any number of hot/cold sorting functions. In one implementation, the initial host write data sorting may be based on a host list of recently written blocks for each sub-drive and a second write to a logical address encompassed by the list may trigger routing the host write to a hotter sub-drive than the current sub-drive.

Claims20

Dependent claims

A storage system, comprising:

storage memory having sub-drives, the sub-drives comprising a first sub-drive and a second sub-drive;
one or more controllers configured to cause:
providing an identification of one or more recently written superblocks for the first sub-drive;
receiving a first data from a host write;
and
when the host write invalidates a logical block address associated with the one or more recently written superblocks for the first sub-drive:
writing the first data into the second sub-drive that is next hotter than the first sub-drive;
and
refraining from writing the first data into an open block in the first sub-drive.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/235,816Filed 20 Apr 2021 · continuation

Priority

12 Jun 2017

Published

US 2021/0240614 A15 Aug 2021

Granted

25 Apr 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

G06F 12/0253
Free address space management: garbage collection, i.e. reclamation of unreferenced memory
G06F 3/0613
Improving I/O performance: in relation to throughput
G06F 3/0616
Improving the reliability of storage systems: in relation to life time, e.g. increasing Mean Time Between Failures [MTBF]
G06F 3/064
Organizing or formatting or addressing of data: management of blocks

Family

Application62/518,513Us provisional application · filed 12 Jun 2017

Application15/954,171Parent of this continuation · filed 16 Apr 2018

Application16/554,527Parent of this continuation · filed 28 Aug 2019

US 10,409,720 B2Parent of this continuation · filed 10 Sep 2019

US 2021/0240614 A1Pre-grant publication · published 5 Aug 2021

US 11,016,882 B2Parent of this continuation

US 2018/0357160 A1Published application

US 2019/0384704 A1Published application

US 11,636,033 B2This patent

From the US filing history. Foreign family members aren’t listed.

System and method of direct write and mapping of data in a non-volatile memory having multiple sub-drives

Life of this patent

System and method of direct write and mapping of data in a non-volatile memory having multiple sub-drives

Life of this patent

Abstract

Claims20