Pool Spares for Data Storage Virtualization Subsystem

摘要

A data storage virtualization subsystem (SVS) for providing storage to a host entity is disclosed. The SVS comprises a storage virtualization controller for connecting to the host entity, at least one physical storage device (PSD) pool, and at least one PSD is designated to be a pool spare PSD to the at least one PSD pool. The at least one PSD pool comprises at least one PSD to store user data or associated redundant information and is given a pool ID for identifying the PSD pool.

主权项

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.