POOL SPARES FOR DATA STORAGE VIRTUALIZATION SUBSYSTEM
First Claim
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1. A data storage virtualization subsystem (SVS) for providing data storage space to a host entity, the data storage virtualization subsystem comprising:
- a storage virtualization controller (SVC) for connecting to the host entity; and
at least one physical storage device (PSD) pool, comprising at least one PSD to store user data or associated redundant information; and
a pool ID for each of the at least one PSD pool;
whereby at least one PSD is designated as a pool spare PSD to a said at least one PSD pool.
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Abstract
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.
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Citations
47 Claims
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1. A data storage virtualization subsystem (SVS) for providing data storage space to a host entity, the data storage virtualization subsystem comprising:
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a storage virtualization controller (SVC) for connecting to the host entity; and
at least one physical storage device (PSD) pool, comprising at least one PSD to store user data or associated redundant information; and
a pool ID for each of the at least one PSD pool;
whereby at least one PSD is designated as a pool spare PSD to a said at least one PSD pool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A spare physical storage device (PSD) designating method for a data storage virtualization subsystem having a plurality of PSDs, the method comprising the steps of:
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defining a PSD pool; and
designating at least one PSD as a spare PSD to said PSD pool.
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41. A method for selecting a spare PSD to use in a SVS comprising a PSD pool, a pool spare PSD designated to said PSD pool, and at least one non-pool spare PSD, the method comprising the steps of:
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selecting the pool spare PSD as a spare PSD to use in the PSD pool if the pool spare PSD is available; and
selecting the non-pool spare PSD as a spare PSD to use in the PSD pool if the pool spare PSD is not available. - View Dependent Claims (42, 43, 44, 45, 46)
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47. A method for defining PSD pool to use in a SVS, comprising the steps of:
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assigning at least one of the PSDs to store user data or associated redundant information; and
giving a pool ID to identify the PSD pool.
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Specification