Patent ID: 9110607
Filing Date: 2015-08-18
Classification: G06F

Abstract:
1. A data storage virtualization subsystem for providing data storage space to a host entity, the data storage virtualization subsystem comprising: a storage virtualization controller for connecting to the host entity; a plurality of normally-used physical storage devices electrically connecting to the storage virtualization controller for storing user data or associated redundant information, wherein one or more sections of the plurality of the normally-used physical storage devices is defined as a logical media unit, and at least one of the plurality of the normally-used physical storage devices is defined as a physical storage device pool according to a pool ID for identifying the physical storage device pool; and a pool spare physical storage device designated to the physical storage device pool for replacing one of the plurality of normally-used physical storage device, wherein if the pool spare physical storage device is available, when one of the plurality of normally-used physical storage devices is to be replaced, the pool spare physical storage device is selected as a spare physical storage device for replacing the one of the plurality of the normally-used physical storage devices in the physical storage device pool; wherein the physical storage device pool comprises an ID-storing device for storing the pool ID.