Microsoft Technology Licensing, LLC

Xiaozhong Xing

Robin Andrew Alexander

Mehmet Iyigun

Yevgeniy Bak

Andrew M Herron

Eric Bluestein

Anirudh Badam

Badriddine Khessib

Mihail Gavril Tarta

Laura Marie Caulfield

Liang Yang

Vishal Jose Mannanal

HoYuen Chau

Danyu Zhu

Zhe Tan

Jian Xu

Hoyuen Chau

Yevgeniy M Bak

Eric M Bluestein

A system includes reception of a request from a first application to create a virtual open-channel solid state drive associated with a first bandwidth and first capacity, association, in response to the request, of block addresses of a virtual address space of the first application with block addresses of one or more blocks of a first one of a first plurality of channels of a first open-channel solid state drive and with block addresses of one or more blocks of a second one of the first plurality of channels, reception, from the first application, of a first I/O call associated with one or more block addresses of the virtual address space, determination of block addresses of one or more blocks of the first one of the first plurality of channels which are associated with the one or more block addresses of the virtual address space, and execution of the first I/O call on the determined block addresses of one or more blocks of the first one of the first plurality of channels.

Virtualized OCSSDs spanning physical OCSSD channels

An I/O processing system includes reception of a request to perform an I/O operation from a user-mode application, providing of the request to a storage device, scheduling of an operating system deferred procedure call to determine whether the storage device has completed the I/O operation, execution of the scheduled deferred procedure call to determine that the storage device has completed the I/O operation, and transmission of a return corresponding to the completed I/O operation to the user-mode application.

I/O completion polling for low latency storage device

An I/O processing system includes reception of a request to perform an I/O operation at a storage driver, and, in response to receiving the request, providing of the request to a storage device, and scheduling a timer associated with a callback routine to determine whether the storage device has completed the I/O operation, and, in response to expiration of the scheduled timer, determination of whether the storage device has completed the I/O operation.

Timer-based I/O completion polling for low latency storage device

A system includes reception of a request from a first application to create a virtual open-channel solid state drive associated with a first bandwidth and first capacity, association, in response to the request, of block addresses of a virtual address space of the first application with block addresses of one or more blocks of a first one of a first plurality of channels of a first open-channel solid state drive and with block addresses of one or more blocks of a second one of a second plurality of channels of a second open-channel solid state drive, reception, from the first application, of a first I/O call associated with one or more block addresses of the virtual address space, determination of block addresses of one or more blocks of the first one of the first plurality of channels which are associated with the one or more block addresses of the virtual address space, and execution of the first I/O call on the determined block addresses of one or more blocks of the first one of the first plurality of channels.

A hybrid drive includes multiple parts: a performance part (e.g., a flash memory device) and a base part (e.g., a hard disk drive). A drive access system, which is typically part of an operating system of a computing device, issues input/output (I/O) commands to the hybrid drive to store data to and retrieve data from the hybrid drive. Some data can be stored in one part but not the other, and this data can be synchronized with (e.g., copied to) the other part at various times. The drive access system provides indications to the hybrid drive of when to synchronize data in one part with the other part. These indications are made so that potential interference with use of the device by the user and/or power saving modes of the device due to the synchronization is reduced.

Dirty data management for hybrid drives

A hybrid drive includes multiple parts: a performance part (e.g., a flash memory device) and a base part (e.g., a magnetic or other rotational disk drive). A drive access system, which is typically part of an operating system of a computing device, issues input/output (I/O) commands to the hybrid drive to store data to and retrieve data from the hybrid drive. The drive access system supports multiple priority levels and obtains priority levels for groups of data identified by logical block addresses (LBAs). The LBAs read while the device is operating in a power saving mode are assigned a priority level that is at least the lowest of the multiple priority levels supported by the device, increasing the likelihood that LBAs read while the device is operating in the power saving mode are stored in the performance part of the hybrid drive.

Power saving mode hybrid drive access management

A hybrid drive includes multiple parts: a performance part (e.g., a flash memory device) and a base part (e.g., a magnetic or other rotational disk drive). A drive access system, which is typically part of an operating system of a computing device, issues input/output (I/O) commands to the hybrid drive to store data to and retrieve data from the hybrid drive. The drive access system assigns, based on various available information, a priority level to groups of data identified by logical block addresses (LBAs). With each I/O command, the drive access system includes an indication of the priority level of the LBA(s) associated with the I/O command. The hybrid drive determines, based on the priority level indications received from the drive access system, which LBAs are stored on which part or parts of the hybrid drive.

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Sammamish, WA, United States of America

Xiaozhong Xing