Pure Storage, Inc.

Benjamin Scholbrock

Andrew R Bernat

Andrew Kleinerman

Zoltan DeWitt

John Colgrove

Taher Vohra

Ronald S Karr

Radek Aster

Peter E Kirkpatrick

Mark L McAuliffe

Ethan L Miller

Robert H Lee

Xiaohui Wang

Grigori Inozemtsev

Tsu-Hao Chang

Brandon Davis

Yunpeng Duan

Neil A Vachharajani

Gordon James Coleman

Timothy W Brennan

Alan Stuart Driscoll

Jimmy Chi-Wai Chui

Iris McLeary

Phillip Hord

John Adler

Conner Haffner

Hari Kannan

Naveen Neelakantam

Boris Feigin

Matthew Paul Fay

Eric D Seppanen

Neil Buda Vachharajani

Yanwei Jiang

Eric Kelly Blanchard

Frank Tuzzolino

Scott Chao

Zoltan Dewitt

Rongjin Qiao

Phil Hord

Caleb Gum

Boris Zemlyak

Mark L Mcauliffe

An indication that power loss protection (PLP) for a non-volatile random access memory (NVRAM) portion of a storage device has failed is received from the storage device. The storage device is marked to indicate the storage device has a PLP failure. A write path to store data at the storage device is modified to avoid storing the data in the NVRAM portion of the storage device that has the PLP failure.

Selectable write paths with power loss protection

A storage system is provided. The storage system includes a plurality of non-volatile memory modules and a storage system controller. One or more non-volatile memory modules include a multiplane die. A processing device of the storage system controller is configured to determine that a number of planes of the multiplane die used simultaneously for accessing data should be changed. In response to determining that the number of planes the multiplane die used simultaneously for accessing data should be changed, the processing device is configured to move one or more portions from an existing erase block to a new erase block, the existing erase block being a different size than the new erase block.

Dynamic plane selection in data storage system

A data segment to be stored at one or more storage devices is formed, wherein the data segment is to be stored at the one or more storage devices using a first programming mode having a first page size. A determination that a fragment of data of the data segment is less than the first page size is made. The fragment of data is stored at the one or more storage devices using a second programming mode having a second page size that is less than the first page size and the remaining data of the data segment is stored at the one or more storage device using the first programming mode.

Utilizing programming page size granularity to optimize data segment storage in a storage system

A method is provided. The method includes receiving a set of data blocks to be stored in a storage system. The storage system includes a plurality of non-volatile memory modules. The method also includes generating a set of segments based on the set of data blocks. A respective segment comprising portions of one or more erase blocks. The method further includes writing the set of segments to the non-volatile memory modules based on orderings of the portions of the one or more erase blocks.

Writing segments and erase blocks based on ordering

A storage system forms an allocation unit for writing into solid-state storage memory. The allocation unit is formed from at least a portion of a first erase block and a first sub block of a partitioned second erase block. The system forms multiple subsequent allocation units. Each subsequent allocation unit is formed from a remaining second sub block of a partitioned erase block and at least a portion of a next erase block. Forming the subsequent allocation units consumes each of multiple erase blocks in a cascading sequence. The system allocates the allocation unit and the subsequent allocation units for writing in the storage system.

Intelligent block allocation in a heterogeneous storage system

Modifying storage distribution in a storage system that includes one or more storage devices, including: detecting, for a storage device among the one or more storage devices, that a storage capacity of the storage device is different from a storage capacity of another storage device of the one or more storage devices, and responsive to detecting that the storage capacity for the storage device is different from the storage capacity of the other storage devices of the one or more storage devices, modifying a distribution of shards of data for a data stripe among the one or more storage devices.

Adjusting storage delivery in a storage system

A system includes a solid-state storage array having a plurality of solid-state storage devices and a storage controller coupled to the solid-state storage array, the storage controller including a processing device, the processing device to select a segment height based on erase block sizes of the plurality of solid-state storage devices. The processing device is further to program a data segment using the segment height to a data stripe across two or more of the plurality of solid-state storage devices and store the segment height in metadata associated with the data segment.

Dynamically selecting segment heights in a heterogeneous RAID group

A first amount of energy to be stored at one or more power loss protection (PLP) components is determined to enable storage of data at a plurality of storage devices of a storage system upon an occurrence of a power failure. A first voltage is provided to the one or more PLP components that corresponds to the first amount of energy. A second amount of energy to be stored at the one or more PLP components is determined based on a change in the storage system. A second voltage is provided to the one or more PLP components that corresponds to the second amount of energy.

Optimizing dynamic power loss protection adjustment in a storage system

A storage system and related method are for operating solid-state storage memory in a storage system. Zones of solid-state storage memory are provided. Each zone includes a portion of the solid-state storage memory. The zone has a data write requirement for the zone for reliability of data reads. The storage system adjusts power loss protection for at least one zone. The adjusting is based on the data write requirement for the zone and responsive to detecting a power loss.

Power loss protection based on write requirements

Managing storage device evacuation that includes a plurality of storage devices, including: detecting, by the storage system, an occurrence of a storage device evacuation event associated with a source storage device within a write group, wherein the write group is a subset of storage devices storing a data set; responsive to detecting the occurrence of the storage device evacuation event, identifying, by the storage system, a target storage device for receiving data stored on the source storage device; and migrating, by the storage system, the data stored on the source storage device to the target storage device.

Data migration for write groups

Predicting failures in a storage system that includes a plurality of storage devices, including: gathering information describing a plurality of blocks within the storage devices; developing, using the information describing the plurality of blocks within the storage devices and information describing known dead block conditions, a block lifespan model; and determining, in dependence upon the information describing the plurality of blocks within the storage devices and the block lifespan model, a predicted lifespan for the plurality of blocks within the storage devices.

Predicting failures in a storage system that includes a plurality of storage devices

A command is transmitted to a storage device to relocate first data that partially fills a first erase block of the storage device and second data that partially fills a second erase block of the storage device to a third erase block of the storage device, wherein the command causes the relocation of the first data and the second data while bypassing sending the data to the storage controller. An acknowledgement that the first data and the second data have been stored at the third erase block is received from the storage device.

Optimized relocation of data based on data characteristics

Modifying storage distribution in a storage system that includes one or more storage devices

Dynamic use of segment or zone power loss protection in a flash device

A storage system with garbage collection prioritizes data segments for garbage collection in the storage memory. Priority of each data segment relates to amount of processing device work for garbage collection of the data segment versus benefit relating to amount of dead data to be reclaimed by garbage collection of the data segment. Garbage collection is performed according to the priority of each data segment.

Optimizing garbage collection across heterogeneous flash devices

Growing community of inventors

Sunnyvale, CA, United States of America

Benjamin Scholbrock