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Reducing driver disk area allocation variation in response to adding storage driver to data storage system using mapped RAID technology

A data storage system, drive disk technology, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve problems such as data loss

Active Publication Date: 2019-08-06
EMC IP HLDG CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, data may be lost when two or more disks fail simultaneously

Method used

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  • Reducing driver disk area allocation variation in response to adding storage driver to data storage system using mapped RAID technology
  • Reducing driver disk area allocation variation in response to adding storage driver to data storage system using mapped RAID technology
  • Reducing driver disk area allocation variation in response to adding storage driver to data storage system using mapped RAID technology

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Embodiment Construction

[0040] Embodiments of the present invention will now be described. It should be understood that the embodiments described herein are provided by way of example only to illustrate various features and principles of the disclosed technology and that the invention is broader than the specific embodiments described herein.

[0041] figure 1 is a block diagram illustrating an operating environment for the disclosed technology, including an example of a data storage system in which the disclosed technology may be implemented. figure 1 The operating environment includes a number of host computing devices 110, referred to as "hosts" and shown for illustration by hosts 110(1) through 110(N), that access data storage provided by data storage system 116, such as through figure 1 One or more computer networks, such as a local area network (LAN) and / or a wide area network (WAN), such as the Internet, are shown by network 114 . Data storage system 116 includes at least one storage process...

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Abstract

The present invention relates to a mapped RAID system that reduces the driver disk area allocation variation when splitting a storage driver group into a first partner group and a second partner group. A first driver is assigned to the first partner group, and then an additional driver is assigned from the unassigned driver to the first partner group, so that each driver assigned to the first partner group has a minimum number of movements of all unassigned drivers. The movement count of the driver represents a count assigned to the driver disk area that must change if the driver is added to the first partner group. After allocating each driver to the first partner group, an indication of the driver is to be removed from an unallocated driver list. A group of RAID disk entries for the first partner group includes the RAID disk entry indicating a relatively higher number of driver disk areas located in the first partner group.

Description

technical field [0001] The present disclosure relates generally to intelligent data storage systems that provide RAID (Redundant Array of Independent Disks) technology, and more particularly to methods for responding to adding storage drives to an array of storage drives in a data storage system that uses mapped RAID technology, when the A technique for reducing drive extent allocation changes while data storage drive groups are split into partner groups. Background technique [0002] A data storage system is a hardware and software arrangement that typically includes multiple storage processors coupled to an array of non-volatile data storage devices such as magnetic disk drives, electronic flash drives, and / or optical drives. The storage processor services host I / O operations received from the host. The received I / O operations specify one or more storage objects (eg, logical disks or "LUNs") to be written, read, created, or deleted. The storage processor runs software th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0613G06F3/0611G06F3/0689G06F3/064G06F3/0631G06F3/0619G06F3/061G06F11/1076G06F3/0644G06F3/0634G06F2201/805G06F2201/82G06F11/2069G06F11/2094
Inventor 韩耕董继炳康剑斌龚绍钦徐鑫磊孙蕾
Owner EMC IP HLDG CO LLC
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