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Virtualization system for virtualizing disks drives of a disk array system

  • US 7,493,466 B2
  • Filed: 06/21/2006
  • Issued: 02/17/2009
  • Est. Priority Date: 09/29/2003
  • Status: Expired due to Term
First Claim
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1. A virtualization system coupled to a host computer and a disk array system, said disk array system having a plurality of disk drives, said virtualization system comprising:

  • a first logical unit being assigned a first Logical Unit Number (LUN) and being a target of an access request sent from said host computer;

    a virtual logical device being related to said first logical unit;

    a logical device being related to said virtual logical device and further being related to a second logical unit of a portion of said disk drives in said disk array system, said second logical unit being assigned a second LUN; and

    at least one controller controls to receive data of said access request including said first LUN and controls to transfer said data of said access request to said second logical unit in said disk array system based on a relationship among said first logical unit, said virtual logical device and said logical device.

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