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Virtual disk drive system and method

A disk space, abstract technology, applied in the direction of input/output to record carrier, generation of response error, redundancy in operation for data error detection, etc., can solve the problem of expensive RAID equipment, large data storage space, not required and other issues to achieve the effect of improving efficiency, reducing total cost, and integrity

Active Publication Date: 2013-10-16
DELL INT L L C
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the system often requires larger data storage space in order to add more RAID devices
However, usually these additional RAID devices are expensive and not needed until additional data storage space is actually needed

Method used

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  • Virtual disk drive system and method
  • Virtual disk drive system and method

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Embodiment Construction

[0054] The present invention provides an improved disk drive system and method capable of dynamically allocating data. The disk drive system may include a RAID subsystem including a pool of storage pages or a matrix of disk storage blocks maintaining a RAID free list, and a disk manager including at least one disk storage system controller. The RAID subsystem and disk manager dynamically allocate data across a pool of storage pages or a matrix of disk chunklets and multiple disk drives based on a RAID-disk map. The RAID subsystem and disk manager determine if additional disk drives are needed and send notification if additional disk drives are required. Dynamic data allocation allows users to acquire disk drives when they are needed later. Dynamic data allocation also allows for efficient data storage of virtual volume matrix or pool snapshot / point-in-time copies of disk storage blocks, instant data replay and instant data fusion for data backup, recovery, etc., remote data s...

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Abstract

A disk drive system and method capable of dynamically allocating data is provided. The disk drive system may include a RAID subsystem having a pool of storage, for example a page pool of storage that maintains a free list of RAIDs, or a matrix of disk storage blocks that maintain a null list of RAIDs, and a disk manager having at least one disk storage system controller. The RAID subsystem and disk manager dynamically allocate data across the pool of storage and a plurality of disk drives based on RAID-to-disk mapping. The RAID subsystem and disk manager determine whether additional disk drives are required, and a notification is sent if the additional disk drives are required. Dynamic data allocation and data progression allow a user to acquire a disk drive later in time when it is needed. Dynamic data allocation also allows efficient data storage of snapshots / point-in-time copies of virtual volume pool of storage, instant data replay and data instant fusion for data backup, recovery etc., remote data storage, and data progression, etc.

Description

[0001] This application is a divisional application of a patent application with an application date of August 13, 2004, an international application number of PCT / / US2004 / 026499, a Chinese national application number of 200480026308.8, and an invention title of "virtual disk drive system and method". technical field [0002] The present invention relates generally to disk drive systems and methods, and more particularly to designing disk drive systems with capabilities such as dynamic data allocation and disk drive virtualization. Background technique [0003] Existing disk drive systems are designed in such a way that a virtual volume data storage space is statically associated with a physical disk having a specific size and location for storing data. These disk drive systems require knowledge and monitoring / control of the precise location and size of the virtual volumes of the data storage space in order to store data. In addition, the system often requires a larger data ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F11/14
Inventor P·E·索兰J·P·圭德L·E·阿兹曼M·J·克莱姆
Owner DELL INT L L C