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Automated on-line capacity expansion method for storage device

  • US 8,266,375 B2
  • Filed: 09/12/2011
  • Issued: 09/11/2012
  • Est. Priority Date: 07/05/2001
  • Status: Expired due to Term
First Claim
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1. A system comprising:

  • a storage system which provides a logical volume; and

    a host which sends data to the logical volume of the storage system,wherein the storage system includes,a plurality of disk devices,a controller, coupled to the plurality of disk devices, which manages a plurality of storage areas provided by the plurality of disk devices,wherein the host includes,an application which sends data to the logical volume, andan operating system which manages a block position of the logical volume,wherein, if the operating system receives a request from the application to expand a first capacity of the logical volume, the operating system sends a write request to the logical volume,wherein, in response to the write request, the controller allocates at least one of the plurality of storage areas to the logical volume, andwherein the controller monitors a second capacity of storage areas allocated to the logical volume relative to a third capacity of the plurality of storage areas.

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