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Logical volume manager and method having enhanced update capability with dynamic allocation of storage and minimal storage of metadata information

  • US 5,897,661 A
  • Filed: 02/25/1997
  • Issued: 04/27/1999
  • Est. Priority Date: 02/25/1997
  • Status: Expired due to Term
First Claim
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1. In a programmed, general purpose digital computer having a memory and coupled to data storage devices, a logical volume manager having computer software operative for:

  • creating a logical unit of undivided storage;

    allocating portions of said data storage devices to said logical unit of undivided storage;

    storing metadata on said data storage devices containing information about portions of said data storage devices that have been allocated to said logical unit of undivided storage;

    automatically changing the size of said logical unit of undivided storage whereby portions of said data storage devices are allocated to or deallocated from said logical unit of undivided storage; and

    updating said metadata after automatically changing the size of said logical unit of undivided storage and only on said data storage devices affected by the automatic change of size.

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