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SYSTEM SOFTWARE INTERFACES FOR SPACE-OPTIMIZED BLOCK DEVICES

  • US 20120054410A1
  • Filed: 07/12/2011
  • Published: 03/01/2012
  • Est. Priority Date: 08/30/2010
  • Status: Active Grant
First Claim
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1. A method of determining features of a logical block device for a computer system, comprising:

  • querying the logical block device with a first query and receiving a response thereto from the logical block device that indicates whether or not the logical block device is thinly provisioned; and

    querying the logical block device with a second query and receiving a response thereto from the logical block device that indicates whether or not the logical block device supports an unmap command, wherein the unmap command is a command to deallocate blocks previously allocated to the logical block device.

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