Virtual disk drive system and method
A disk drive and disk technology, applied in the direction of input/output to record carrier, generation of response error, error detection of redundant data in operation, etc., can solve unnecessary, expensive RAID equipment, large data storage space and other issues to achieve the effect of reducing total cost, improving efficiency, and integrity
Active Publication Date: 2013-10-16
DELL INT L L C
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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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[0054] figure 1 One embodiment of a disk drive system 100 in a computer environment 102 is shown in accordance with the principles of the invention. like figure 1 As shown in , the disk drive system 100 includes a RAID subsystem 104 and has at least one disk storage system controller ( Figure 16 ) Disk Manager 106. RAID subsystem 104 and disk manager 106 dynamically allocate data across the disk space of multiple disk drives 108 based on a RAID-to-disk map. Additionally, RAID subsystem 104 and disk manager 106 can determine whether additional disk drives are needed based on the allocation of data across disk space. If additional disk drives are needed, a notification is sent to the user so that additional disk space can be added if desired.
[0055] According to the principle of the present invention, in one embodiment, in figure 2 A disk drive system 100 with dynamic data allocation (or "disk drive virtualization") is shown in , in another embodiment, in Figure 14A ...
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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 bit 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 d...
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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